Affiliate marketing is a tricky business. It involves years of training and understanding of things like consumer psychology, writing compelling sales copy, understanding search engine optimization and online marketing, knowing how to build sales funnels and squeeze pages and so much more. But it's also incredibly lucrative. Some affiliate marketers make millions of dollars per month, but reaching this level is excruciatingly hard.
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. 
This is a nice and useful article. May I suggest another idea? If you believe in bitcoin, with a small investment, you can start a master node in the cryptocurrency world. If you are not geek then do it with the help of gincoin. Also, there are shared master node services if you want to put in an even smaller amount. Don’t forget to invest only that which you can afford. Do your research.
Online business is how I’ve made a living since 2003 and what has helped me retire early.  I make over $20,000 a month through my blog. You can create your own blog here with my easy 15-minute step-by-step tutorial.  You can start a blog for as little as $2.95 a month (less than a cup of coffee!).  Create a blog and leverage it into affiliate sales or product endorsement deals. Consider topics like:

These days, break even cycle for an offline business (like shops, retail outlets, eating joint etc) ranges from minimum 1 year to 3 years but when you start an online business, somehow, people become very impatient and want to see the results and profitibility within few days. In my experience, good number of people who ventured into blogging (or something similar) as a serious hobby have been able to see success far more than others who started off with purely money making mindset.
By building an extensive following, this will allow you to gain profit by attracting key advertisers or get commissions by promoting other brand products (think affiliate). Blogging is big business; just ask Heather from Dooce.com. She’s a mom that blogs daily about her children and pets and has successfully turned her daily adventures into a very lucrative business by simply making money blogging. One of my favourite ways to make money from a blog is by creating your own online course.
Freelancing via the Internet is a great way for experts in their individual trades to help a variety of clients overall. Several freelancing and project-based websites let businesses that need extra help to list their projects. Small businesses and freelancers offer proposals, ideas, or bids, whereby the buyers can easily choose what they want and need. Sites like Elance or Upwork cover just about everything including writing content, creating graphic design, programming, and data entry.
Affiliate marketing is the best way for anyone to start earning money online. This requires zero investment & you can use your blog or even your social media platform like Twitter, Facebook to promote and earn money. Here is the best beginner guide to Affiliate marketing. I know of bloggers earning thousands sitting at home just with affiliate marketing. Here is a post where you can see how much a person like you and me is earning from affiliate marketing.
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Many online retailers offer adjustments when the price of an item you’ve purchased drops within a certain amount of time. Paribus is a free service that takes advantage of this fact. Paribus monitors your purchases, watches for price adjustments or late deliveries, and requests refunds when applicable. Those refunds go back into your pocket. You have to allow the service to scan your email for receipts, but it works with a variety of big retailers, including Target, Nordstrom, Walmart and Costco.
There are many freelance options for graphic designers who are looking to make money online. Designing layouts and graphics for promotional material, corporate reports, magazines or book covers, are all tasks that businesses are looking for online freelancers to complete. Due to its flexible nature, graphic design possibilities can range from one-off projects to ongoing work with regular clients.

This is a great post Yaro. I like the progression you take us through on which things you tried first and eventually evolved into doing now. I know for me #8 and #9 work best for me to achieve passive income online. I started with eBay also and like you said I think it is a great way for beginners to learn SEO, sales copy, customer service, handling transactions etc. This will prep you for selling your own physical or digital products on your own site. Do you think you will hit the mobile space?

How much will you make? I think my best month with Google AdSense was almost $5,000 over the last ten years. That amazing month blew my mind since it was actually near the beginning of my blogging journey. When you go from making zero to $5,000 in a month, that will rock your world. For me, it also got me even more excited because I knew there were other ways to monetize.

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