Learn in the sand with a paddle. If not available, find some soft (no/few rocks) dirt on a slight incline/uphill. Get into second mid-throttle (getting in the powerband), stay seated but up toward the tank, and begin a power wheelie (without pulling back on the bars). Try that to get the feel of your power band with the wheel off the ground about 2 feet. Run it up to just before WOT and then just gently let off the gas to drop the front wheel to the dirt and slow down. Keep in mind that when learning this way, if you are accustomed to keeping a finger or two on the front brake, try not to do that. It will prevent an unwanted stoppie. Also, try and learn to do this power wheelie with your foot ready on the rear brake. I suggest getting this (power wheelie) to a science, even shifting through the gears before going for the balance wheelie.
Sorry for the long reply, Sly