Someone sent me a link to AllMyFaves.com recently - at first I ignored it, but now I kind of like it.
It's a visual list of popular website, broken up into cataegories like Video, Maps, Search, Travel, etc. It reminds me of the early days of Yahoo, with two guys making a directory of useful internet websites. But seeing everything on one screen is helpful (and being a visual person, I like the logos).
And that's it's compiled by "a team of experts," I can reasonably presume that these are the "important" websites in each category (at least, important to someone). Which is great for me to learn of a new website, or to use as a cheat-sheet to see what the kids are using. Plus, it helps with reference questions like "what's another website like Facebook and MySpace."
I did notice they didn't have a "Books" category, so I made my own: