I've never done any scrapbooking, because I'm really don't have an exciting a life to scrapbook...
I do make a lot of greeting cards,which is my creative outlet... I've seen stuff on QCV and think it's a little pricey. But it's probably a good starting point and gives you everything you need in one spot.
I will go to Michaels or other craft stores and check out the scrapbooking section, for doodads and other stuff like that to put on cards... I can get really carried away, and spend a forutne on stuff.
There's a catalog that I absolutely love
Flax Art has a paper catalog that has all sorts of neat papers and stuff...