Measure your tire pressure at least once a month, using a good-quality tire pressure gauge. Measure the pressure when the tires are cold. Don't forget the spare.
Underinflation is the number one enemy of a tire. Operating an underinflated or overloaded tire at highway speeds on a warm summer day is a recipe for tire failure.
1) Be sure to measure the inflation pressure of your tires, including your spare, at least once a month. While doing so, take a moment to ensure that the tire is securely fastened to the vehicle.
2) Don't overload your vehicle.
3) Be sure to add air to your tires during the winter months. Make certain that both the air pump hose valve and the tire valve are free of snow and other debris that could cause a leak in the tire valve.
Don't forget to put the cup back on the tire valve when you're done.