Came across a big long list of goofy April Fool's pranks so you can either...

A. Not get tricked by one

Or...

B. Pull one on a friend and laugh (Ha!) until...

C. He(She) reads this list and returns the favor.

Here we go...

Turn every setting in someone's car to the maximum: the heat, the radio, the wipers, the seats...

Place a pair of pants and shoes inside the only toilet stall in a rest room to make it appear as though someone's STILL IN THERE, UGH!

Hide a small radio in the ceiling tiles above someone's desk and turn it on veeeery soft.

Borrow someone's cellphone and change the setting to a foreign language.

Hide scented air fresheners all over someone's office (all different conflicting scents).

Hide food in a trash can and when someone comes by, grab some and eat it. (Ewww!)

And here's my favorite...

Bring multiple sets of clothing to work, change every hour and act like nothing's different!

And don't blame me if any of the above ideas brings the desired response. 

DaveT