"Pedalling, braking, pedalling, braking, pedalling, braking" - Always remember Hans Rey saying this with his funny accent on an old video with the Martyn/Martins I think.
In the vid he was kicking into a wheelie stance, then literally kicking then stopping and so on....though this is obviously easy for someone with so much experience and balance.
Like has been said before though, its just practice practice practice, getting used to the feel of balancing on the rear wheel, but the best suggestion I can give is to try to phase out the endo stage, and gain the technique of just kicking up the front onto a balance point on the rear wheel. It'll come with time!
HTH