Where and How can you earn money on the internet?

Here are some websites and their short descriptions. I have earned from all of these sites, if you have questions, feel free to leave a comment.

Dreamstime - A microstock photography site, basically, you sell pictures, or illustrations here.
http://www.dreamstime.com/

Hubpages - An article hosting site. You write articles based on SEO standards, you get traffic, you earn revenue from advertizing.
http://hubpages.com/

Adsense - An advertising company owned by google. You should have your own website or blog. You place ads over your site and you earn based on thousand impressions and clicks on the ads
https://www.google.com/adsense

Payperpost - you need to have an active blog. Advertizers look for blogs where they want to advertize their product or site. If they like yours, you'll get an offer. You make a post, they review the post, If it gets approved, you get paid in 30 days.
https://payperpost.com/

CloudCrowd - A crowd sourcing website. Companies divide large projects then forward these to this site then the Site divide the jobs into tasks wherein workers take tasks and earn money. You get paid the next banking day.
https://www.cloudcrowd.com/

OnlineJobs.ph - you post your resume here then someone, most likely foreigners, hire you. You two agree on the terms, hours per day of work and how much you get paid.
http://www.onlinejobs.ph/index.php