Focus on the surveys and offers at the top of the list. Here's a tip not many people know. CashCrate has a special algorithm that automatically selects the best surveys and offers and places them at the top of the list. There are several factors that go into determining which are the “best”, including payout, approval rate, and a variety of other factors. But all you need to know is that these surveys and offers are great, so you can do them in confidence!
Sites like Share-A-Sale and Amplifinity provide referral fees. Vendors set the referral fees they're willing to pay and for what services. When the transaction happens, you get paid by the company for introducing a new customer to them. uRefer also allows merchants to set up referral programs for introductions and meetings, in addition to any transactions made.
If you are an expert on a particular niche topic and can assemble some of the best resources on it from around the web, then you can create topical hubs and get paid through sites like HubPages. You'll earn even more money by creating your own niche site, though. Established topic sites have a built-in supply of traffic and tools to make content creation easier and are among the most profitable online business ideas. Once you've established yourself as an expert within your niche, you'll be able to make money from a combination of ad revenue, affiliate fees, and more creative avenues like online courses, other digital products, and one-on-one coaching fees from others who want to learn directly from your expertise.
Once you have that problem or need nailed, the next step is to validate that idea and make sure you’ve actually got customers who will pay for it. This means building a minimum viable product, getting objective feedback from real customers, incorporating updates, testing the market for demand, and getting pricing feedback to ensure there’s enough of a margin between your costs and what consumers are willing to pay. 

Normally you’ll be asked to test a few websites by visiting them and to document and record your reactions and thoughts as you go through it. It’s really easy to get set up making extra money online by testing websites. All you need to do is sign up to the following services: UserTesting.com, Userlytics, TryMyUI, Userfeel, TestingTime (UK only), or Side Income Jobs.
VIPKID provides an international learning experience to children in China between the ages 4-12. Headquartered in Beijing, the company offers fully immersive one-on-one English language instruction provided online by highly qualified teachers. The curriculum is based on the U.S. Common Core State Standards and uses a flipped-classroom approach to foster creativity and critical thinking skills. 

If you have previous experience as a computer programmer, or have skills in this field, then there is plenty of work you can pick up as a freelancer. If lack of confidence is holding you back, then Free Code Camp is an excellent way to get your foot in the coding door. This organization provides free courses where you will build real-life apps and programs, giving you experience and plenty to add to your CV.
Great list! I have another to consider that I personally have 35+ years experience providing. Clean up litter outside commercial properties on foot using inexpensive hand tools. It’s almost as easy to do as going for a walk! I started doing this as a side gig in 1981 and soon grew it into a profitable full-time business. I share my experience in my book, Cleanlots.

Local businesses are struggling. Many have websites, but aren’t getting any results from them. Others don’t have websites at all. You can help by learning search engine optimization, how to set up an email list, and more, and then implementing these for local businesses. If you typically hang around geeks, web marketers, or the Web 2.0 crowd, you may be surprised how many business owners are 10 years (or more) behind you! If you can deliver results, business owners will happily pay. Find customers by going door-to-door.
It's a little more involved. Companies, especially those with stores, will want to get the opinion of the customer as they go through a transaction. For a bank, it might be opening up an account. For a retail clothing store, it might be trying on a shirt and checking out. Sometimes it's just calling up their customer service line with a problem and seeing how the representative treats you. 

If you have nothing of value to sell from home then retail arbitrage might be a better option for you. Many people partake in arbitrage to earn a little extra money, and for some it has even become their full-time job. Retail arbitrage is the buying of goods at a low price and then selling them on a different platform at a higher price. Sales in shops provide ideal opportunities to pick up products for next to nothing. These can then be sold on eBay or Amazon for higher amounts, making you a nice profit.
Now, I know what you’re thinking. Most of the software and apps you use on a regular basis are made by massive companies or established development studios. Well, yes. But many successful apps, particularly those in the Apple and Google stores, are created and marketed by individuals and small businesses. In fact, independent developers made $20 billion in the App Store in 2016 alone.
MyPoints rewards its members for online activities such as reading emails, playing games, online surveys, printing out coupons among other things. They pay their members using their own currency known as “Points”.  These points can be redeemed for online gift cards, cash via Paypal, and travel miles, etc. The minimum payout amount for most rewards is $10; however, PayPal payments start at $25. Redemption times for your awards vary. When you redeem your points for cash via Paypal, the request is usually processed within 4-5 days. For other prizes, the wait time varies.
Not only will this multiply the money you’re bringing in in a serious way, but it protects you against any sudden changes in the market or in your business. Remember that old saying about putting all your eggs in one basket? A few hours a week committed to just one or two of the following opportunities will put you in a much stronger position to be financially safe and independent.
Blogger, which you can set up for free in less than five minutes, automates Google AdSense so that you can make money with your blog by displaying ads and getting paid when people click on the ads. To make more money, set up an affiliate program (see below) for books, music, and more, and insert your affiliate links whenever you refer to those items. A good strategy to set you on the path to success is selecting a unique topic, writing intelligent copy, and telling all your friends. You'll be off to a better start with a targeted audience.

Market your course: The beauty of using a course to make money online is that you can continue to sell it for as long as you’d like. Look for niche communities on Facebook, LinkedIn, or Reddit that might benefit from your content. Guest post on relevant blogs and sites. Look for anywhere you might be able to get in front of the right people. With just a few hours a month you can continue to generate sales.
Consider selling in lots. A lot is a collection of similar items that is sold in a group. For example, if you have a collection of books, magazines or similar pieces of jewelry, consider selling them all at once in a lot. You many not make as much money as you would have if you sold each item separately. However, the items will likely sell more quickly in a lot than they would individually.[29]

If you want to clear some space out in your house and have a big stack of books you’ve been holding onto for too long, you can make money selling your books and textbooks online. Stores like Half Priced Books and others will give you cents on the dollar for each of your current books while you can check what your book is worth by simply entering the ISBN number on Book Scouter.
White labeling products involves purchasing pre-made products from a supplier and then adding your own labeling and branding. Products could range from candles to gym equipment or even tea, but all will come without labels, allowing you to create your own new range of merchandise. Most suppliers will advertise the fact they offer white labeled goods on their websites, so pick your niche and then find the right supplier and product for you. Once labeled, products can be sold via sites like eBay and Amazon, or from your own eCommerce store (discussed in a moment).
Ipsos is an established, trusted survey company offering a competitive payout. Ipsos i-Say is a survey site run by a division of Ipsos, one of the largest market research firms in the world online. The website is pretty straightforward; you take surveys and get paid in points, which you can redeem for various gift cards and prizes. Get started earning money with Ipsos. Click here to join the Ipsos i-Say Panel now!
Another strategy to make money online is to become a social marketing manager. Being present on social media is key for any business that wants to attract new customers, promote their products and grow their following. However, constantly posting, liking and commenting on the numerous social media channels is extremely time consuming. More and more businesses are recruiting social media managers to run and organize all their social media. And to save money, social media employees are often employed as online freelancers.
Consider the controversies around the ASMR community. ASMR, or autonomous sensory meridian response, is a tingling feeling beginning in the neck or back experienced by some people when they listen to soft or strange sounds—like a woman whispering into a mic, a dry paintbrush on a canvas, or crinkling paper. A booming, highly profitable community has emerged on YouTube creating content that caters to those with ASMR, where (usually female) YouTubers try to trigger the response in viewers. The YouTubers often are dressed in strange costumes or act out scenes that could be viewed as pornographic or sexual in nature. That’s prompted PayPal, which prohibits the sale of digital “sexually oriented” content like pornography, to ban a number of popular ASMR creators, effectively cutting them off from a significant revenue stream.
For example, iStockPhoto.com, owned by Getty Images, requires you to apply to be a contributor. You can submit Photos, Illustrations, Video and Audio but you will need three samples of your work. If accepted, you'll be paid a 15% commission for each file downloaded and if you agree to be exclusive. If you make iStock your exclusive royalty-free agent, you can earn up to 45% with additional attention.

Cafe Press: This website allows you to create digital designs that can then be sold on the platform. You'll earn a commission for everything that sells and you'll never have to deal with printing, warehousing, customer service and so on. The site has over 2 million independent designers that have created products being sold online here. If you have some graphic design skills, then this is a great potential source for your web-based income. 
I recently gave some marketing tips to a bunch of local professional photographers who formed a company about 3 years ago. There are 7 of them and they were making around £400 a month (collectively). So I advised them to create a website, show their individual skills on the site, and start promoting themselves. (No no no, not the way you are already thinking!) The skills about their technical know-how, courses they can offer, and (very importantly) reviews of the latest equipment on the market. 

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