Investor, programmer, author, and entrepreneur James Altucher hates to fail, but he understands the knowledge that comes from it. Altucher lists the 10 things all entrepreneurs fail at in a post on TechCrunch:

You will lose the faith of investors. Not all of the time, and hopefully not at the end, but there will come a time when the investors question you. This is normal. Answer their questions. Be honest about mistakes, about what you learned from them, about what you expect in the future, and then move towards that future.

Read and learn from all 10 here and tell us in the comments what you learned from a recent failure.