I used to zig zag my edges, but then I was having trouble with my machine light (vibrations from the zig zagging would make the light go out; it turned out to be a faulty light), so I started making several small notches along the cut edges; the fabric frays between the notches, but there are none of the longer threads that wrap around and cause wrinkles. Now that my light situation is fixed, I could go back to zig zagging, but the notching is faster and doesn't waste thread. However, I believe I lost less fabric with the zig zagging and it was neater, and not all those bits of tangled thread everywhere.