I have tons of tabs open mostly because I hate the back button. Every time I open any new page it goes in a new tab. Any time a page will be relevant for more than the next five minutes, it gets moved to the front or back of my list (depending if it's for business or pleasure). If it might be interesting, it floats in the middle, otherwise it gets closed.

Admittedly this is probably a strange way of working with the web, but I like to be able to easily find things that I've been working on recently. Only at the end of the day do I fully scan through my tabs and bookmark anything I'll need to reference later.