This is a fav of mine:

On the back-I don’t need to write that down, I’ll remember it.

On the front-The Biggest Lie I Tell Myself!

Is that cute or what? Oh, possibly a dig at old people, you think? How about this one, then:

On the back:I don’t have grey hair. I have wisdom highlights.

On the front: I am VERY wise.

On the back: I decided to stop calling the bathroom “JOHN” and started calling it “JIM.”

On the front: I feel great now that I go to the “JIM” regularly!