Some dogs are lethargic and sore after the procedure, some are bouncing off the walls and ready to go go go. Buddy was bouncing off the walls, Banzai was curious to his new suroundings, but he was very tired (he came home, officially, the day after his surgery).
As far as advice about before or after.. there's nothing really to say. Don't panic, listen to vet instructions pre-surgery. Keep your dog as calm as possible afterwards.
If your dog does experience some discomfort, then it's best to try to keep him as comfortable as possible... give him some of his favorite things, etc..