Approach the box head-on. If you come in at an angle, you’ll probably slip right away. When you’re spinning, it’s tough to tweak your direction, so keep things sliding in a straight line from the start.
Master a balanced 360 in the air before you try this – not big floaters, just little ones. Be sure to land squarely on both feet. The number of spins you get on the box depends on how hard you set your rotation.
For maximum spinnability, keep your weight over both feet and keep your edges flat. Land with your feet fairly close together to avoid carnage. Don’t lock your feet together – a stance just narrower than the box is fine.
As you near 360 degrees, look for the end of the box. For success, you have to ski away straight or switch, which takes the right amount of rotation on take off. If you’re off, open your arms to stall, or bring them into your chest to speed up the rotation.