Unlock extra Levels:
Win a gold medal in all X Games competitions to unlock the Deep Freeze Mountain, Grind Or Die, Halfpipe Winter Style, and four more Slopestyle Events.

All boards:
Press X, Circle, X, X, Up, Down, Left, Right at the main menu.

Get money easy:
Go to the lounge and tell the man that you want to do filming. Pick cliff jump film and start. Watch out for a big ramp to do a 900 mute. This will bring you 1500G.

Night courses:
Successfully complete all four minute events in X Games mode (SnowborderX, Superpipe, Big Air, and Slope Style), to unlock Big Air and Super Pipe at night.