Play Bitcoin Games
The Bitcoin site Cointiply provides earning Bitcoin by playing games. While playing one of various flash games you will get points which can be redeemed for bitcoins.Play
You can also win free Bitcoin for playing a quiz game. Answer the questions correctly and get great prizes. There are various categories like science, movies and sports.
If you want to borrow or lend Bitcoin, take a look at this list of Bitcoin Lending Sites for additional information.
You can also earn Bitcoin with your own website or blog. There are various Bitcoin affiliate programs and networks supporting Bitcoin payments.