spread your legs and bring the bars down fast so that you can get the deck under you before you land, oh and bring the deck to you, don't go down to your deck
Bring the deck to you, don't go down to it. Best advice I could give really.
Not the best shining example but here's a clip http://www.youtube.com/watch?v=C1YlLlEb6GM Just watch some vids in slow mo, see what people do, and then keep trying it until it becomes comfortable.
I only ever ride flat - how long does it take to learn them because I can do quite a few tricks and am getting bored of a lack of progression? Also how about bri flips (I have the motion)?