This from terribleminds is a good read for any aspiring writer. Be warned about the language, but sometimes that may be the kick of inspiration you (I) need.
It’s time to keep an eye out for the landmines and bear-traps we lay for ourselves along the way, those dreaded pitfalls that help to ensure we won’t finish the s*** that we started. Whether you’re participating in NaNoWriMo which always makes me want to say: NaNoWriMo Williams: The Adventure Begins! or writing a script or a game or an invented memoir about your fictional time as a glue-huffing base-jumper, you need to be aware of those things that might stop you from getting it done.