I would give all the human race uncontrollable flatulence. Wherever any gathering of a number of people takes place, thier flatulence would play the Blue Danube. No matter how much they tried to hold it in they would not be able.
Planet ping pong and Asteroid marlbes.
I would travel to impending super and hyper novae with marshmallows.
Spinning on Saturn;s rings!
Telling funny stories about human beings to the other gods
I haven't got the faintest clue because I am not God...