Truth be told, I believe that developing multiple streams of income is the most effective way to make money online. The sites mentioned in this title do not promise wealth, and I don't suggest you quit your day job. However, these 10 sites do have potential and when combined can make you some extra money on the side. Some are more lucrative than others, you be the judge.

MTurk, brought to you by Amazon, connects companies or individuals with people (like you and me) to perform HITs (Human Intelligence Tasks). Some of these HITs pay as much as $5.00 per hit, and some very simple tasks pay $.02 per task. However, the smaller tasks can build up because thousands may be available from the same provider. This site is very simple to use and you can receive your payout directly deposited to your bank account or in the form of an Amazon gift card.

If you love to write and would like to get started on your portfolio, Helium is the perfect place to start. Helium pays per performance and the earnings potential grows as the quality of your content grows. Publishers can also browse articles from this website and give you a small fee for a one-time non-exclusive right to republish your article. Best of all, you always keep the copyrights to all of your articles!

Associated Content is another great website for aspiring writers. It is a bit different than Helium, but I would suggest joining both sites to find a preference.

At Squidoo you create "lenses" that are similar to hubpages. Your lenses can be about any topic you choose.

You probably know a thing about Hubpages if you are reading this article. However, if you perhaps found this article through a search engine, Hubpages is very different from Helium and Associated Content. On Hubpages, you are in control of your own advertisements. You can easily integrate Google Ads, an Amazon affiliate ID, and more to create a stream of income through your Hubs.

About.com is another great site for freelance writers. However, there is an application process. It is a great opportunity to become a guide on About.com is your are accepted.

Salesconx is a site that brings projects and providers together and pays a commission if you can help! It has a great potential for earnings if you are successful.

Do you like to take pictures for fun? Would you like to turn it into a career? IStockphoto is looking for your quality photographs. You get paid every time your photo gets downloaded. How great is that?

Shuttershock is similar to iStockphoto and you can earn by uploading photos that your have taken and earn a fee for every time is is downloaded.

uRefer, like Salesconx, allows you to receive a commission for connecting the right people. All you have to do is look through the listings and find one that is appealing to you. Then, find people that fill the needs of the marketers.