Mechanical Turk: Amazon's Mechanical Turk is a resource for doing human-intelligence tasks, or as the site commonly refers to them, HITs. You get paid a very small fee for any given HIT and you'll need a good deal of volume to make a substantial amount of money. But it is a resource you can use in your spare time to generate a small income online. 
Amazon offers a service called Fulfillment by Amazon (FBA), which can be extremely useful for arbitrage sellers, or others selling their own products. If you opt for FBA, Amazon will store, pick, pack and deliver your products. That means you can scale your arbitrage business quickly as you don’t have to store products in your own home or waste time with postage.
28. Subscription – If you think of something valuable (newsletter, online magazine, etc.) that you can consistently offer on a certain basis (weekly, monthly, etc.), you may want to offer a subscription service. This could be a fee charged each time your product is sent out or on a monthly basis. Either way, this has to be something that your customers can only get by subscribing to your website.
I also participate in online surveys through the following websites, that work in the US and internationally (I use them all and I'm based in Brazil, for example) - Opinion Bureau, Myiyo, and Green Panthera. All of them have a variety of surveys and pay well. All you need to make money is to have 20 min or so to answer a few questions every day/week and have an active Paypal account so you can cash out.
Product Development can be too cost prohibitive for many budding Digital Entrepreneurs who intend to Start Home Business. Likewise, acquiring an inventory of products also carries a risk of losing money should the product not sell. While you might be able to return them to your supplier, it will likely be at a loss. Another problem with carrying your own inventory is the need to ship them to your customers. This is labor and time intensive, which may require putting an employee on your payroll. The dynamics of Affiliate Marketing eliminate the Product Development and inventory concerns.
Rent out a parking spot. If you live in a busy or congested area and have parking to spare, you might be able to rent out your parking space for some quick cash when you’re not using it. Simply advertise your open parking space online including details on the location, whether it’s covered or uncovered, and your desired hourly, weekly, or monthly fee. If you want, you can even use a site like Just Park or download the Spot App to reach more potential customers.
What does that mean for you? It means Nielsen will pay you $50 a year to keep their app on your favorite internet browsing device. The app itself collects statistics on your internet usage anonymously, so you never have to worry about any data being linked to you. And the best part is, the app takes up barely any space and doesn’t slow down your phone or tablet at all!

Teaching and tutoring English as a second language is a great way to make money online, not to mention open some doors for you to travel the world if you'd like. While full ESL (English as a Second Language) accreditation is recommended, as long as you’re a native speaker and have the ability to teach, there are people in countries such as Hong Kong or the UAE who are willing to pay upwards of $25/hr for you to tutor them English via Skype. Check out Indeed, Learn4Good and Remote.co for remote english tutoring jobs or sign up on a specialized site like VerbalPlanet or Chegg Tutors.
25. Products – You can create your own product, such as an ebook or computer software. You would then use your blog as a promotion tool to get people to buy your product. As long as you create a legitimate product with a whole lot of value, you should be able to get some buyers, but like everything else with a blog, you’ll need the traffic to get the sells.

I also use InboxPounds, a site where you earn for web searching, completing surveys, doing small tasks, reading emails, playing games, and more. I use InboxPounds for searching, instead of using Google, and earn money for each completed search. You can also visit the site for offers a few times a week and complete tasks. You can cash out using Paypal as well.
You could also opt to use existing websites for making money. These include both active income and passive income methods. For example, you could sell some used items or invest in creating some digital designs that then can be sold on merchandise. Again, devote a sizable portion of your time to passive income so that you can slowly build up earnings that will arrive on autopilot without any extra added effort. 

A fitness site can have numerous revenue streams. Create healthy eating plans and recipes and lock them away as premium content. Promote and sell a fitness training course, eBook, or a series of videos. Or advertise your own personal fitness services on your site. Topfithub is  a good example of a fitness site with decent video content alongside product reviews.
The best smartphone apps are based on the freemium model, which allows some level of game play or usage without having to purchase. But this also means that you have to build something with real inherent value. It also has to be highly engaging if people are even going to consider paying for an in-app purchase. Take the time to really research this money making opportunity before diving in head first.
Selling digital products can be just as successful as selling physical products. Graphics, software, eBooks, design elements, sound effects, songs and videos are just a few types of digital products that are in popular demand. So if you can turn your hand to creating digital products, let’s have a look at how you can make money online from this skill…
That “urgent” email from a wealthy Nigerian Prince who claims to have a fortune with our names on it, to the blaring online video by the latest rambling internet marketer who swears we can get rich by using their system, to the late-night infomercial that beckons us to try a simple system that countless others have used to get rich, we’ve just about seen it all, haven’t we?

Becoming a VA can entail some degree of training or briefing, depending on your qualifications. However, if you have good communication skills and are capable of using applications like MS Office, you can just sign up on sites such as Elance.com, 24/7 Virtual Assistant, Assistant Match, eaHelp, Freelancer, FlexJobs, People Per Hour, Uassist.Me, Upwork, VaVa Virtual Assistants, Virtual Staff Finder, Worldwide 101, Ziptask, Zirtual and so on. A VA my expect earnings in the range of Rs 500-Rs 4,000 per hour. 

What’s the catch? None, really. Cash back apps act as affiliates for many online merchants, which means that whenever you make a purchase through one of the apps, they get a small commission — but then, they give you a portion of that commission as “cash back”. For example, if I buy a pair of Nike shoes through the Ebates app (or website) and spend $75, Ebates may get a $10 commission but then they’ll pass $7 back to me. It’s basically a way to get sale prices on stuff that isn’t on sale!

One of the cool things about Google AdSense is that it's so easy to get set up. If you have a blog or website, you can sign up for a free Google AdSense Account. From there, Google will give you a unique code that you will paste onto your website. Google takes it from there, tracking your page views, traffic, and earnings on your behalf. There is no upkeep or maintenance to get this thing going, which makes it a no-brainer if you have a website already.
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