As you reach the top of the hit or jump your arms should be thrown in the direction that you wish to rotate. This gives the momentum that you need to force the board through the whole of the rotation. Keep your eyes on your landing site. Extend legs and relax.
Most riders keep their arms out-stretched for added balance.
Bask in glory. Laugh at your friends as they're next. Life is good. You obviously like boarding and are getting good at it.