TIP: If you do shave against the grain to get that extra-close shave, you should always finish with another stroke with the grain. This will "reset" the hair stubbles in the correct direction and greatly prevent razor burn! (This works also for men's facial hair.)

From:http://www.sexylabia.com/pubic-hair2.htm

Since I'm not equipped with a pussy I can't say from personal experience, but since I do own a pussy my observation of it being shaved is that the tips on that website or pretty useful.