What would be in your golden retriever starter pack?

We are getting a puppy (soonish) and have started to make preparations for them , doing things like cleaning up any exposed cords, making sure things like shoes have a cabinet to go into. We have quite a bit of stuff from our other dogs we are reusing in terms of toys. But what are your absolute musts for a new golden puppy?

We have: Dozens of stuffed animals, Rope toys, Silicone style chews, Puzzle feeders, Slow feeders, gates to block off the stairs, Lick matts. A large crate (need to get a divider)

What are some high value treats you used for puppy training? I usually use tiny pieces of string cheese mixed with their food and soft chew treats like zukes.

How did you make your first vet visit exciting and positive?

How did you socialize pup before 16 weeks with parvo risk? What sort of things would you expose them to?