The exact rotation pattern depends on the vehicle and the tires themselves. Again, the owner's manual should describe the recommended pattern for particular car. The standard pattern is to move the front tires straight to the rear, and move the rear tires to the front, but cross them over (so that the right rear ends up on the left front). The reverse pattern (rear to front, front to rear with a crossover) is also common. The exact pattern isn't really that important as long as you're consistent each time you rotate the tires. Just make sure every tire spends some time at each corner of the car.
