Chinatown is a great neighbourhood to visit, but I would definitely recommend going off the beaten path – look through your guidebook for some routes, or talk to the staff at either of the HI Downtown Hostels (these awesome hostels offer free tours of different parts of SF… every day!) On the main road, you’ll find a lot of touristy shops that sell the same thing over and over, and on the side roads, you’ll find a bunch of little stores that sell things you don’t recognize… and owners who don’t speak enough English to tell you what they are! There are many teashops, make sure to stop in one for some tea tasting. Vital Tea has great service, and Uncle Gee will give you advice like no other! It’s also worth it to figure out how to get to the Golden Gate Cookie Factory, where you can watch women handmake fortune cookies. You can pay $0.50 to take a picture of them, and $1.00 for a custom fortune cookie.