On Fridays, I take time to deal with my ever-present stack of sign requests. The Main Library has a dozen or so areas where book displays are rotated out monthly.
Sometimes I am pressed for sign and people get word on a colored background (although I do put thought into the color choices and the weight of the typeface).
Other times I get a good idea that's simple enough for me to create quickly.. Here's a sign I recently made that really appealed to me.