You can't help passing Oakville Grocery, on the way up to wine country, from SF. Actually, it's at the perfect stopping point to take a rest, stretch the legs and then, hunker down for the rest of the drive. That's how they get you, but because once you're inside it's hard to resist the amazing provisions they have stocked here. The deli is really fancy, and they make killer sandwiches (there's always a line). The shelves are stocked with preserves, fancy sauces, wine, cheese, produce. Best of all, are the free samples. The store is always so crowded that you can make 3, 4, 5 rounds around without anyone noticing. That way you can fill up on good eats, hold off lunch for a few hours, and save your money for the wineries.