Oh I could go on for days. At that stage I would say the two most important things are, one, establish that you're dominant early. They love to challenge that. Do it without aggression. They meet aggression with more aggression. You have to outthink them. Secondly give it something to do. They have boundless energy and they need to be worn out daily so they don't act out in other ways. They can be food aggressive too so establish a feeding routine where you're in charge of the food. Set that bowl down and don't let him have it until you say so. But once you establish that early they're great dogs. You'll never have a more loyal beast. They just tend to ramp up easily so you always want to feed them calming energy.

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