Avoid dog parks, shelters, pet stores that sell animals/puppies. The small 'mom and pop' type pet places that sell high quality food and aren't big box like petsmart shouldn't be too bad. Anywhere there's a lot of dog poop is a risk, so avoid public grassy spots that are full of poops. But do go for walks down the sidewalk, check out traffic, public transit if you can bring a puppy. Go for coffee at a friend's place and have puppy along for that. If there's a daycare with an outside play area, go past there when the kids are out playing.
The first few days your pup is going to be in 'shock' from the changes of being removed from mom and littermates and 'home' and so you don't want to push a ton at them, but get them into a routine of housebreaking and crate training etc...
Then do some outings. Even driving in the car to the airport and parking near the runway is good, things like that will help a lot and slowly increase the adventures. If your pup reacts like he's done it all his life, then great, if he's unsure then do more socializing and outings with lots of treats. Kilt is going to be in a parade here in town next weekend, with horses and so on. So I'm sure that'll be fun. She's nine months but I still like to toss new things at her.
