make up a character to act out in order to bring people in to your ride queue
I like this idea.
Put the ride on max speed and stop it in the middle of a loop.
I'm only trained on the Ferris Wheel and the Carousel, and none of the coasters have loops anyway :sadvaultboy:
Start a project at home that requires thought and planning. Put off most of the planning until you get to work, and just use all that standing-around-time to think and plan your project.
I already do this to an extent with the level design I do in Source, but it's frustrating thinking of ideas and not being able to implement them until hours later after work, by which time I'm usually not in the mood.