Multiple SAT tests - if, when, how far apart?

If and when should a student register to take a second SAT? How far apart? Recommendations?

Only take more SAT if the previous one is not good enough for the schools you are aiming for. Definitely stop once you reach 2300. How far apart depends on your schedule and how much greater a score you need. I looked at when my holidays were and tried to take SAT as soon as possible after holidays.