There are several websites that will send bitcoins your away for visiting other websites. One of the best known is BitVisitor.
BitVisitor gives you free bitcoins after you input your Bitcoin address, solve a verbal captcha, check out a website during 5 minutes and click a green "Next" button. 
Bitvisitor now offers a 50% profit sharing affiliate program! 
http://www.bitvisitor.com/?ref=19iozvbwsBPKPJ66LU7xX4BP4JPiDHfPiQ