To do a frontside 180, pop an ollie, but as the board goes up push your trailing foot to the toe side and your leading foot to the heel side. Move your whole body counter clockwise (your board should follow you) and land. As you land try to keep your balance in the middle.
Tips: Just ollie pretty high and keep your feet above the bolts at all times. Oh yeah, this move is easier to do moving, although you will fall off pretty badly the first few times you try it. Just learn how to balance it. And don't wuss out, cause if you do, you'll end up being more hurt.

Trick contributed by: www.skateboarduk.com