Flat-backed beads—big sale at the craft store!
Fabric scraps from my friend Polly the costume designer. I use them behind clear colorless glass for custom tiles.
Aforementioned custom tiles in progress, using fabric scraps and scrapbook paper from the craft store. I also use magazine pages.
Buttons from the giant flea market at the fairgrounds! They're lots of fun to work with, though I'm still trying to find the right kind of hard clear coat; the plastic is susceptible to terrible scratching from grout, no matter how careful I am.
Also from the giant flea market—earrings and pendants discovered during a happy rummage through a pile of treasures on a dollar table. I snip off the posts and backs.