You can pick up some great tips on how to write flash fiction by reading this post by a student in C.M. Mayo’s recent "Flash Fiction Workshop" at the Writer’s Center. She offers this class on a fairly regular basis, so if you like what you read here, keep an eye out on the Writer’s Center site and sign up for the full treatment.
I thought this was a great way of looking at revision:
“6. Edit by asking the question "Why do I want to stop reading?" Keep reading until you have an answer. When you know WHY you want to stop reading, you have an editing task at hand.”