I LOVE pre-cut sets of entire collections of fabric! :) Mostly fat quarters, layer cakes and charm squares. I'm not all that hot on strips, though, as I don't do a lot of stuff that needs this particular size. I can't even imagine how much I've actually spent on my stash of these goodies. I just can't help myself.
To answer the original question, I usually get 4-6 matching charm packs for a quilt and, if possible, a pillow sham.