What kind of pranks can I play on my husband?

I want to do the saran wrap on the toilet trick, but how's that going to work since he'll see it when he lifts the lid? What else can I do to get him? The other night he asked me to get some water for the dog, and when I did the handheld sprayer soaked me because he'd taped it ON! Pretty good one, but I've got to find better :)