Stand up on the pedals, move your hips towards the bars, pull up while putting a half pedal stroke in to get the front wheel off the floor, as its coming up lean back and get your bum low/sit down. A half pedal stroke and a fluid movement of weight from over the front of the bike to the back of the bike low down should be enough to get you to the balance point, then continue pedalling like a boss, using your back brake to help keep you on the balance point.
You'll know when you get it because it'll happen in a split second, and you'll be on the floor clutching your arse/coccyx in massive amounts of pain
(Ps welcome)