1. Ride ALOT. More than you think you need to.
2. Sort your bike out with some decent kit, tartybikes.co.uk
3. Ride with as many other people as possible, prefereably better than you
4. Watch alot of videos
5. Buy Tricks and stunts from halfords.
6. Learn the basics before you try too hard to go 'big'. Do things over and over again till you get them smooth, everytime. Then move on.