I'm anti-Fisherman's Wharf, although you should get an In-N-Out while you're here with Animal-style fries (although I'm partial to Culver's myself). There's not much in the Financial District (I work there, at Sansome and Sacramento), but you're close to a lot (North Beach, Chinatown, SoMa). Walk over to the Ferry Building by the Embarcadero in the morning and get some cheese and sourdugh for breakfast and watch the ferries coming in past Yerba Buena Island and the Bay Bridge, and then take the California cable car up to Chinatown and tool around a bit--it's pretty touristy but worth seeing. As for other stuff, try and take a walk over the Golden Gate Bridge, go out to Golden Gate Park (my neck of the woods--the Japanese Tea Garden, the Botanical Gardens, and the Park Chalet out by the Pacific are good places to while away a pleasant hour or two), Alcatraz is a great visit, maybe even try and head up to Twin Peaks--it's a fantastic view up there. PM me if you want restaurant suggestions. Bring a jacket--it's cold here now--and have a good time. There's a lot wrong with San Francisco--the Muni is terrible, it's very expensive here, and homelessness is rampant--but it's a really beautiful, great city with a lot going on.