OneNote is pretty good, but it's one more application to have running and to switch to :(
I to had the same problem, but ContentSaver came to the rescue (http://www.macropool.com/en/). It works just like bookmarks in IE, but I can assign something to multiple categories, store notes, and a snapshot of the page (in-case it doesnt exist when I need it again). I've tried lots of alternative ways of keeping bookmarks, but this fits the best.
Brant: pity, fair enough.
Mike: I hear what you're saying about it being one more app - ContentSaver looks really interesting from a research point of view (though I'm not as keen on the UI itself - I quite like the freeform notepad metaphor).
I always assumed thar OneNote was some kind of tablet pc application to be a digital notepad. Your post seems to suggest otherwise, it might be useful to me.
Perhaps I should open the shrinkwrap on that boxed retail OneNote that I have at home.
Let me know how you go with it!
As I mentioned, it took some getting used to, but now it's nigh-on indispensable.