Upwork: This website offers a great marketplace for selling just about any professional service. You don't need a merchant account, website of your own or anything else for that matter. All you need to do is be able to provide a high-quality service at a reasonable price. But be informed, you will have to compete with many others that are constantly bidding on open jobs. 
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.
Re-selling web hosting will enable you to make money hosting your own client’s websites. Large hosting companies like HostGator allow you to white label their hosting services. You could start your own hosting business or, if you are a web designer, include hosting into your web design packages. And the best of it is the hosting companies take care of the hosting for you, so all you need to worry about is selling.
Now, it’s time to plan out your show. If you’re doing an interview-style show, you’ll now want to start getting some guests involved. You can use your existing social network to reach out to people you already know or are connected with on Twitter or Facebook. You can also head to Medium or Amazon to find authors or experts on topics specific to your niche.
This is similar in concept to micro-tasks, except that it is oriented toward specific services, such as cleaning services, pest inspection, handyman services, house cleaning, lawn & garden services or any of the skilled trades. It might actually be more accurate to say that it is a platform where skilled service providers can offer their services to site visitors, similar to Angie’s List.

Thanks alot for this comprehensive list. I personally appreciate the various methods you have layed out but in my opinion the heart to making money online lies in Traffic. Not just any kind of traffic but supertargetted traffic that converts. The key for newbies like myself ofcourse are to unlock the traffic potential then can we be best able to show our offer to various visitors on the internet such as ebay or banner ads as you put it.
As the Internet continues to evolve, opportunities to earn supplementary and full-time online income will grow. The very definition of work in an information-based economy is evolving, with traditional full-time jobs disappearing in favor of different arrangements (e.g. self-employment, flexible schedules, changing skill sets, etc.). In this respect, giving it a try can open up new career and business options.
Become an Amazon Associate and then use Keyword planner to find an in-demand niche: With more than a million different products to choose from and up to 10% commission the sales you drive, Amazon’s affiliate program is a great place to get started. Browse their available products and see what connects with you. Or take it a step further and use Google’s Keyword Planner to quickly check how many people are searching for a specific term. With affiliate marketing, the more relevant traffic you can pull in, the more you’ll make off your site.
Here’s a good example of how lead sales can work in real life: My second website, Life Insurance by Jeff, brings in a ton of traffic from people who are searching the web to find answers to life insurance questions. While I used to have the website set up so I could sell these people life insurance myself, it was a lot of work to process all the different requests and clients. As a result, I started selling the leads I gathered instead.
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