1) Join a Signature Campign in this Forum to Earn Free Bitcoins and it is worth your time also....
2) You can Buy/Sell Digital Goods In this Forum If you Want to Start with a Little Investment......
This are the two most common ways of earning bitcoins and most of the users of earning in the same way, and earning from signature campaign is really good only thing at a moment you need to take care is that you get selected in campaign.
Yup most of the campaigns are closed for new participants and I think only yobit is entertaining new joinies as it is automated campaign so one can join that and start earning.