I use Delicious.
Basically it is your browser’s Favourites or Bookmarks but they are all saved online and they are tagged, so I can access them anywhere and put them in any amount of categories that I want.
On top of doing my links for the day I’ve also put my latest links on my sidebar so you can keep track of the links I’ve been bookmarking. They are under Recent Bookmarked Links For the most part the links I save for the day probably won’t be the ones I bookmark so make sure you keep an eye on those too for lots of interesting sites.