What methods you use to make extra money online?

I prefer to use free methods to make money online.  For example, Google Adsense, online surveys and affiliate programs.  Because I would like to minimaze the cost.

I search free stuff on internet to increase the traffic to my website. Using social networking sites has impressive result. Facebook is a great tool to get traffic. But provided that the content of the website is useful for the audience.

Later I share more my ways to get traffic.

What is your ways?

Adsense for content will change new look

Information from Adsense Blog, the Adsense for content ad units will change new look.
According to the blog,
Leaderboard (728x90): the title, description, and URL are now arranged in rows instead of columns (except in the case when only one ad is showing)
Medium and large rectangles (300x250, 336x280): the URL is now in the same line as the title

Hope these changes can help the publshers.

Source: http://adsense.blogspot.com/2010/08/new-look-for-adsense-for-content-ad.html