Start with a 35mm slide mount, a stencil knife, and a magazine advertisement. Use almost any type of magazine. I prefer women's fashion magazines, because I like curving, organic shapes found in the folds of fabric. Some people like the hard edges of car or technical magazines. Move the slide mount over the page until you see an abstract design you like. (You're not looking for pictures!) Then, copy the design inside a small rectangle traced in your sketchbook. If you like, cut out the original and paste it next to your sketch. After you have collected a lot of these, you can see your design preferences: geometric, organic, pattern, etc. Use the designs as structure or background for a painting, quilt, scrapbook page, or other artwork.