San Francisco must visit: Bar Tartine! 561 Valencia Street San Francisco CA 94110
Flour and Water : Pizza & Italian in San Francisco (from Food & Wines best 25 Pizza Places in the US)
Tacolicious - 4 Locations in SF (Chestnut St, Valencia St daily, 11:30 a.m. to midnight, Ferry Building, NorthBeach) and 1 in Palo Alto Lunch & Dinner
Rickhouse: Excellent cocktail in a part of town that can be hard to find good cocktails crafted with care. I used to worked down the street when I visited SF and this was a stop for every trip. I love the Noble Savage made with mezcal.