icarusancalion wrote a very awesome, well thought out meta post about Challenges. Not only does she identify the problems writers run into with them BUT she also has SUGGESTIONS for how to avoid them! Amazing, huh?
Go read it here:
How To Keep Your Challenge Commitments, or: Strategies For Challenge SuccessVerily, it is both amusing and informative.
icarusancalion has been both a long-time participant in challenges, a moderator/coordinator, and had successes and not-so-successful-moments. She's got some great (and seldom-heard) things to say about the self-discipline of writing, which apply whether you write for challenges or just for yourself.
Read, learn, and pass it along.