Say goodbye to your life. This has already destroyed mine.

[Cereb Daithi]

It's called Stumbleupon. When you install the small toolbar it places itself on your browser. After a brief setup where you tell the system your interests via come check-boxes, you begin. Every time you click the button it takes you to a random site in it's vast database within your interests. As you go through the sites (all of them are awesome trust me) you click an "I like it" or "I don't like it" on the toolbar (if you want) and it will learn your interests and adjust itself accordingly. The more you use it the more it starts to give you sites right in your line of interest. I've been using it for about 3 weeks now and it's to a point where I literally have to fight the urge to add every single site it takes me to to my favorites. I already have a folder with about 40 sites in it.. and that if with me restraining myself. This is one of the ultimate time killers. It literally has everything. That mac mod site i have on the other thread was thanks to stumble.

This thing is a blast

http://www.stumbleupon.com/

[chicken n waffles]

yeah i had that one for awhile. i uninstalled it for the very reason you love it. very addictive.