What steals your Mojo and what do you do about it?  (I define Mojo as the enthusiasm and motivation to write)

For me there are 2 main Mojo Bandits:

1.  Insecurity.  All those little voices that insist that I am laying down bland, boring drivel and calling it a story or chapter.  They whisper things like "You actually think you are creative?".  I've gotten better at resisting this particular thief by viewing my novel as a marathon.  Right now it doesn't matter how good it is keep writing until you get to the end.

2.  Oddly enough, writing and publishing advice.  While some of it helps (Jim's Blog, Stephen J. Cannell's lecture on screen-writing, and writing excuses podcast) much of makes me feel overwhelmed.  Too much to accomplish with too little talent.  How can I keep all that in mind when I am writing?  Getting published sounds nigh impossible.  I try and recognize this negative influence and limit my reading to select items.  As far as taking advice seriously I mainly use 2 criteria to strain through the sources (1) Are they published professionally (2) do I like their writing.  I also remind myself that I am not trying to write literature, just tell a story I would like to read.