Funnily enough, this was one of the many threads I read with interest before we brought Willow home at 8 Weeks and 4 Days (already having had her first vaccinations)
Since then we have been out most days to somewhere, including walking up and down our road. My Sister-in-Law owns and runs a Pub so we go there a lot. It doesn't have a garden, just a courtyard so there's no concerns about the grass etc so Willow loves it! We've experienced all sorts of things... Dray lorries delivering, various (known) dogs, lots and lots of people, and noisy traffic (including lorries, buses, sirens, motorbikes and even helicopters!)
We've also been to meet my wife for lunch at a cafe in the high street twice which again has a courtyard. This is great as she gets to experience the noises and lots of people as well as how to behave in the situation where people are eating.
She doesn't mind the lead too much and we have been walking down the road and back (not actually that far) and even over on to the grass at the edge of the woods opposite when she's needed to relieve herself, although I'm going to wait a little longer before taking her through the woods as it is a high traffic area for doggies ad I don't know all of them.
We went to the vets today for our booster, and then to the other vets that we are actually going to use (they don't use the correct brand of vaccines) and had a good wander around. I don't think the first vet was too impressed when I let her walk into the surgery and the consulting room on the lead :wink: She loves being in the car and goes pretty much everywhere with me but doesn't seem too concerned if I leave her anywhere for a short while! I've exposed her to being left in the car for a couple of minutes (although the windows and boot were all open as it was so hot this week) as well as leaving her in places in the house and outside in the garden.
I put all of this down to the fact I read this thread and have socialised her from the first day she got home arranging play dates with known dogs and getting out and about straight away. Thank you very much to the OP! Without the advice here we could have had a completely different pup (at 10 weeks) to the one we have who just isn't phased by anything and loves being out and about! She just needs to learn that not everyone wants to play now!