These (http://despair.com/viewall.html) are much better than the "Motivator" posters commonly found in boardrooms and cheerful people's offices... ;)

Samples:Blame: The secret to success is knowing who to blame for your failures.

Cluelessness: There are no stupid questions, but there are a LOT of inquisitive idiots.

Idiocy: Never underestimate the power of stupid people in large groups.

Yeah, I've always liked these more than their corporate motivator equivalents. Especially the one about Motivation. That one's my favourite.