Got a new puppy?
Think about what you want long term and start training for it now.
If you don't want your adult dog on the sofa...don't bring him up there now "cause he's just a puppy".
If you want your adult dog to be "good in the house when left alone"...then start now by implementing good supervision and use crate training to assist you.
You want your dog to be good with your kids? Then supervise the puppies interaction, keep a drag line on him and interrupt the jumping and play-biting. AND teach the kids how to behave properly around the puppy.
If you start out doing it right from the start, you won't have to fix it later.