Get your weight low and raise up quickly. The bike will come with you. It's really not hard at all. You can raise both wheels at the same time. You don't HAVE to do the 'raise the front wheel first' method. Having a little speed helps. Practice just riding down the road. It really is not very hard at all.
Now, of course years of dirt bike riding makes this second-nature to me
. You can do the same thing on a 250 lb dirt bike.
Again you do not have to have clipless pedals or clips to do this. Dirt bikes don't have such things.
Raising front wheel method on a trials bike(motorcycle):
http://www.youtube.com/watch?v=qZeLKep5AFM
Now on a heavier dirt bike:
http://www.youtube.com/watch?v=tF7z5kUR1ow