I came across these great recycled wood signs by William Dohman (via decor8) and I love their worn, slightly imperfect appearance. I'd love to get my hands on one, particularly, "Keep Calm"— I'm a little bit of a spaz sometimes and could probably use this reminder once in a while.
He also has some great photos and prints available. This one made me laugh:
images via Willam Dohman on Etsy