Union SQ area for shopping, within the same area tons of restaurants and of course Bloomingdales for more shopping.  

Union square has already been mentioned.

Lombard street? Nightlife at the California Academy of Sciences?

Ghirardelli square for an ice cream sundae.

Pier 39 for crab.

The ferry building on Saturday mornings for the farmers' market.

House of prime rib? A5 wagyu ribcap at 5A5? Ike's sandwich? In-and-out burger? Zanze's cheesecake? Egg tarts at Golden Gate bakery? Look up restaurants on Yelp.

Golden Gate Bridge,
Fisherman's Wharf,
Alcatraz Island,
Golden Gate Park,
Chinatown

Shoot, here
http://www.tripadvisor.com/Attractions-g60713-Activities-San_Francisco_California.html

Done them all at one time or another

To add to restaurants, one of my Favorites on the Wharf
http://www.fishermensgrotto.com/
Best Clam Chowder, Bar none

You are probably within walking distance to Coit Tower. It has a nice little green area around it.  

Walking around the city, during the day, is probably the best thing to do. There are many interesting stores, restaurants, and buildings. When out at nite, make sure there are lots of ppl around or take a taxi. It is just not safe for a woman alone at nite in certain areas.  

Brenda's French Soul Food, on Polk St., is a great restaurant, and not expensive for what you get. But don't walk in that neighborhood at nite. It's the Tenderloin.

Hi,  Let me know if you need a guide for a few hours on Sunday Evening or anytime on Monday.    My tour rates are very reasonable this time of year.  I'm easy on the eyes but to be honest I'm originally from New York (but don't hold that against me) but i do know the city.  Take a chance you might be quite surprised
and enjoy yourself