Earning money online has become difficult due to the intense competition and the attraction of working from home. A few years ago a good photograph, writing an article, reviewing a movie or medical transcrption would earn decent money but now things have changed. Most people on an average would not be able to earn great amounts by working few hours online.
If you really want to work online and earn a lot, you need to focus on mutli-tasking and diversification on the web.
1. freelance writing
2.Job or rescource submission
4. Have your own website and blog spot
5. Take online rental services
6. Have a portal for online transport/cargo/courier booking
7. Regularly participate for paid jobs related to feeback, survery and product use.
8. Having e-book or e-resources for a small fee.
9. Adverts in your own website
10.Small handyman sites for the local region that focuses on information and placements for security, home maid services etc.
11. google adsense account
Once you start this, have a professional approach, in terms of web etiquette, newsletter publishing, blogging all in a manner that projects you as a disciplined individual among the numerous competitors. Focus and develop the art of blogging ( food, travel, unusual trouble shooting etc).
Sometimes people stretch the rules and get paid for reading emails, clicking on adverts, participating in TV TRP rating jobs etc.
Since you have posted in ISC experts section, you can start contributing in the jobs, resources, ask the expert and article section and slowly start earning. You can participate in online competitions that are in ISC, participate in sites like quora etc.