oh, and for f***s sake, make sure your spelling and grammar is spot on!! If you "ain't real good" at it, get someone who is to proof read it for you.
If you're going to be posting it off, make sure you look at it before you put it in the envelope. I've seen a couple in which the formatting buggered up, but ended up across our desk anyway! Impossible to read!
All the previous posts hit the nail on the head. 1 page (2 max). Simple. We are simple folk.