Do a search using such words as "printable" and "labels" and you'll find a gazillion nifty things that can find a perfect home on a scrapbook page. Here are a few of my recent finds as I was surfing through cyberspace.
From Poppytalk came these cool number tags:
And how about these circle number tags from Creativity Prompt? Just size them to match the size of a circle punch you have, and voilà, you have a cool, ready-to-use accent.
How fun are these little speech clouds that I found on All Crafts Blog:
and some more...
I hope I've shared a couple of bits and pieces you might be able to add to your scrapbook pages. I'd love to hear your favorite sources for finding printable stuff.