Guest greetings are easier when your puppy already knows where to go and what to do. Practice before people arrive by rewarding your puppy for settling on a bed or mat near the room.
When visitors come in, keep greetings short and calm. Reward your puppy for four paws on the floor, then guide them back to their resting spot before excitement builds too high.
Consistency matters more than long sessions. A few clear repetitions each week will make the routine familiar.