Just one piece of advice...

[tbunce]

What they all said, plus...

Carry a brush to dust off your lens. Use it often, especially after a prop aircraft turns away from you when it starts up and taxies away. You also need a microfiber cloth to clean off the oil splatters if it's a round engine. Learned that one at Chino this year and thankfully had one courtesy Nikon from last year's Indy Airshow.

A little effort every half hour will save you so much time, you might not even bother fixing them otherwise.

[RichardVM]

Always remember to format your memory cards in your camera before a shoot, but occasionally format them in the computer and again in the camera occasionally to help maintain the "health" of your cards. Got that nice tidbit from a friend who knows far more about computers and cameras than I do.

Richard