To do a kick flip, put your feet in the same position as in an ollie, but your leading foot should be hanging off the board by about two inches on the heel side and should be at a forty five degree angle. Pop an ollie and as you slide your leading foot forward slide it off your board with a fast motion. Sort of kick it off. This should make the board spin. While it's spinning bring your leading foot back. As it finishes spinning smack the board down with both feet.
Hints: Don't try to pop your board too high at first. Instead just pop it high enough for it to make a full turn. This makes landing it a lot easier. Try to keep both feet directly above the board during the trick. Once you get really good at kick flipping try doing a double flip. All you do for it is spin the board faster and jump higher. (It's two kick flips in one).

Trick contributed by: www.skateboarduk.com