Tip #1: While the old tire is still on the bike, Take a good, sharp Carpenters' Knife, and cut the tire right down the center of the tread. Once you break the bead, with a little Tire Slime, the half tire practically falls off. This also saves the time of having to remove the valve core, and later replacing the valve core; assuming you havent lost it.
Tip #2: Get a buddy to help. You just need a third hand, when it comes time to spoon that tire on. The buddy also comes in handy when it is time to shove the axle back in.
Tip #3: This is a good time to put in the Schmancy Looking, but relatively cheap, angled valve stems. Makes life a lot easier. KTM uses them in certain applications.
Ive been keeping a rough count of how many tires I have changed, for myself, and friends. I am up to around 60. Think of how much money that saved, compared to buying the tire at the dealership, and having them put it on.