Let me toss in my two pennys worth on how to get started on burnouts.
Dry pavement! Lock the front wheel, you won't need a block to hold the tire. The brake works just fine. Stand up so your weight is off the bike. Keep your feet in fairly close so there is not much room for side to side movement of the bike between your thighs. While holding the brake with one or two fingers, grasp the throttle with the remaining two and crank up the rpm to 2500-3000 and let the clutch out gently until you feel the rear of the bike begin to raise. At this point gently let the clutch out until the tire breaks loose and begins to spin. Once the tire is spinning be sure you let the clutch out all the way. Keep one or two fingers over the clutch.
Now, the trick is to keep the tire spinning without killing the engine keeping in mind the slower the tire spins the more controlable it is. You will certainly kill the engine a few times while getting a handle on how to reach this point without stalling the engine.
Once you have reached an acceptable spin on the rear tire, slowly release a little pressure on the brake lever until the bike begins to move forward. Now, walk the bike forward using your thighs to keep the rear tire in alignment with the front. Now your brake lever controls the speed of the bike so you can walk it ahead as slowly or as fast as you like.
Once you have done this a few times, sit on the seat once the bike is moving continuing to control the speed with the brake and walking with your feet. Soon you will be able to begin picking your feet up and placing them on the foot pegs. Once your feet are up the front wheel is in total control of balance, speed and direction. When you sit on the seat keep your family tree snuggly against the tank and lean your upper body forward.
Remember, the slower the spin the slower things happen equaling better control. It will take some practice and you will kill the engine many times but practice will make burnouts safe and entertaining both for you and your admirers!
If you are serious about mastering this entertaining aspect of your motorcycle, go to your dealer and pick through his discarded tires for practice. Burnouts become very expensive if you don't have a supply of used tires!