For my top 5 I'm choosing sites that aren't already in my RSS feeds in some form.

1. Hubby's blog!
2. BlogBuzzer, so I can publicize hubby's blog.
3. IMDB, not that I watch a lot of movies or TV but it makes it easy to look up about them.
4. GoodSearch/GoodShop, so I can search/shop and earn a bit of money for my chosen charity at the same time.
5. MapQuest, which I guess I could live without since there are other maps out there, but this is the only one that's just about maps.