Back Flip: Press R + Z + Down(3) (requires big air).
Barrel Roll: Press L + R, Right, Up, Left.
Cliffhanger: Press L or Z + Left, Right. 
Decade: Press R + Left, Right.
Decade and a 360: Hold L + R, then press Left, Down, Right.
Front Flip: Press R + Z + Up(3) (requires big air).
Front Flip: Press L + R, Up(3)
Front Flip/Barrel Roll: Press R + L (or Z), Up, Down, Up.
Hand Plant: Press R + L or Z + Down, Up(2) (requires big air).
Lazyboy: Press L or Z + Right, Left. 
Nac Nac: Press L or Z + Right, Down. 
No Foot: Press L or Z + Down.
No Hander: Press R + Up.
One Handed Superman Seat Grab: Hold R + L or Z, then press Up, Down(2).
Pointer: Press R + Left, Left.
Reverse Front Flip/Barrel Roll: Press R + L (or Z) , Down, Up, Down.
Superman: Press R + Down(2).