Also wanted to share a few of the better places I've found blank papers for printing...staff, tablature, and fretboards, stuff to use when you want to write out songs, scales, chords, whatever. I'll also gather up all the links and put em in the first post for subsequent browswers.

various guitar grids (fretboards) <--links to .pdf file
various sheet music, tab, and grids
fretboards with inlay markers