By far the most common mistake that you can make when filing for bankruptcy is trying to do it by yourself, or spending a couple hundred dollars on a petition preparer who cannot give you legal advice. I can't tell you how many times I have had clients come to me to try to fix things that were done incorrectly, and they end up spending a lot more and it's a lot more stress than what would have happened if they had just come to see a qualified attorney initially.