actually, I would disagree. This works for some people, but I found that if you concentrate on jumping high, you end up falling. I found a ride-on style box and tried barely popping. Since you have less time in the air, you naturally dont rotate the whole 270 degrees, but your brain naturally turns your skis to catch the rail. Then as long as you remember to keep your feet shoulder width apart (or wider) you should be fine.
not that any one way to do it is wrong, but sometimes a different approach helps. good luck man.