How do you explain your game to other people? How do you take the experience and make it easy to understand? What goes into a good elevator pitch? You need to be able to explain your game differently based on the audience -- a publisher, a play tester, or a gaming stranger.

How to explain your game differently based on the audience: a publisher, a playtester, or a gaming stranger (video)

Do a game for each contest that you can. You don’t have to actually submit your design, you don’t even have to finish it, but spend some time coming up with an idea for every possible contest possible. It will inspire you, not every time, not every contest, but you’re going to be looking at one of them and come up with a great idea that you wouldn’t have had if you weren’t stretching yourself.
— Troy Pichelman