Whenever I park my bike, I always make sure it's in the big ring and middle of the cassette, so the derailleur cage is vertical (draw an imaginary line through the centre of the jockey wheels).
I also ensure both tyre valves are at 6 o'clock and the cranks parallel to the ground, right crank pointing forward.
It's important to get these things right in case any passer-by stops to look at my bike - can't have them thinking I'm an amateur.