1. approach the box or rail at a comfortable speed. I would suggest going slower than usual, this will give you more time on the rail.2. pop off the kicker and onto the box or rail. make sure you keep your feet shoulder width apart
3. tilt the heel of your leading ski towards the ground, grip the edge of the box or rail, and use it to shift your momentum.
4. If you do the first three steps right then your body should start to turn frontside. When this happens, pop into the air and turn 90 degrees. make sure you lead with your head and shoulders and your body will follow.
5. you will most likely land switch, so make sure you have a decent landing.