HOW TO EARN MONEY ONLINE WITH LITTLE INVESTMENT?

1. Decide of a topic in which you are interested or you know much about that topic which you think is worth sharing with others.
2. Try to get a topic, whose details are rarely available on internet and there are very few sites where this topic is discussed. 
3. Get a internet connection at your house, register a catchy domain name for your website and finally purchase web-hosting package that suits your needs. If you are a beginner a basic package would suffice. This is the only investment you have to do apart from your time. 
4. Now put content on your site which is absolutely unique and not found anywhere else on the internet.Always keep your site updated with the latest contents. 
5. Do some marketing for your website through link exchanges, social networking, blog-commenting etc which are all free.See to it that your website is search engine friendly so that you will get visitors from search engines like Google, Yahoo, Bing etc. You can do this by using proper keywords in your contents. 
6. Sign up with advertising agencies like Google Adsense, Adbrite, Kontera, Infolinks, Mediafire etc. All of these ad agencies will place their ads on your sites and any visitor who clicks on these ads will earn money for you. Great isn't it. 
7. Use affiliate marketing. Where in you are selling other's product on your site and earning commission for each product sold through your website. One of the best affiliate marketing site is Commission junction. 
8. Create blank spaces on your site putting a 'Space available for advertising' note there. You can also earn through this if advertisers find your site interesting enough.After doing all this, you have to continuing putting contents on your sites and promote it.The earning potential through Google adsense, Commission junction is practically unlimited and it is directly proportional to the traffic you get.