Here are some simple hints on socializing puppies after 16 weeks of age (shots are complete at 16 weeks):
Socialize your Fila Brasileiro by allowing your dog to go everywhere you can possibly take him/her. This will:
Build confidence in a variety of situations.
Strengthens the bond between the two of you.
Is a great opportunity to practice obedience.
Clarifies normal human interaction for the dog. (DO NOT have people walk up to the puppy to pet it. If the puppy goes to them, pets are OK.)