I reliably find what I'm looking for at the Fremont Sunday market. It's easier to find great vintage clothing, housewares and furniture that it is a thrift store or garage sale, not as competitive as an estate sale, and less expensive than an antique store.
There are some jewelery and candle makers I like, but most of the time I'm searching for vintage fabrics, side tables, chairs, sweaters, bags, colorful tins, vintage jewelry and surprises.
Some of the things I've purchased there: a great beaded summer bag for $6 that everyone wants to know where to find one of their own, my favorite TSE cashmere cardigan for $25, a cute nightstand for $18, a vintage bird cage holder that I use to hang a paper lantern for $13, a 40's era dinning table and chairs that needs refinishing for $185 and I could go on and on. You won't necessarily find exactly what you're looking for on your first visit, but make it a habit and you'll find it.
It's also just fun and relaxing to wander through, people watch and buy nothing.
The only problem I've had is with a couple vendors who I bought furniture from and paid extra for delivery and they never delivered it, so bring cash and truck if you are looking for something big.