I keep a roll of low-tack painters tape in the kitchen. It's used for everything from sealing misbehav'n boxes (below, with a little tab-handle) to labeling food I'll share with others. I have been known to tape a recipe to the cupboard door for easy reading, and it doesn't damage the walls when displaying kid's artwork.
So... Do you use "blue tape" around the house? I can't imagine my kitchen without it.