I DO like the shopping idea, that's always my first choice! BUT if you must use your stash, here is an idea. I went through my stash and matched colors in sets of three. These I put in a large zip lock bag so they would stay together. I did it on a day when I wasn't looking for anything spacific, that seemed to help in finding matches. When you don't have a pattern you are looking to match, you see things a little differently. I also had a dear friend who has a great eye for color help me. She came up with combos that I wouldn't have. It makes it so much easier. After doing that, I found that I did use more from my stash.