Last summer I got to spend half an hour in a lovely little quilt shop, People, Places & Quilts in the heart of old Charleston, SC. An employee was doing a demo of the "Lil' Twister," a plastic template tool made by the Country Schoolhouse to help you make easy pinwheel quilts. Naturally, I had to have one.
At my quilting retreat last month I pulled out a stack of purple batik or hand-dyed fabrics and started cutting them into squares.
When I was finished, I laid them out rather randomly, just trying to make sure there was some contrast between a block and all of its neighbors. This was about as far as I got before the retreat ended.