Just go outside of your hotel and walk around, you'll run into something to do in the first 5 minutes. Rent a bike.
Personally I like the hiking trail at Land's End. The Yoda Foundation at Lucas Art's HQ. The Arcade Museum or whatever french name it goes by, since you're bound to go the Fisherman's Wharf either way *rolls eyes*. Rent a row boat at Stowe Lake. Check out the Conservatory of Flowers. There's the Seward street slides, nothing wrong with grown people going down a slide. Walk the steps of the Coit tower. The FIlberte Steps puts you into a secret garden vibe.
By the end of all that you're probably all famished. Hopefully you had a reservation at the House of Prime Rib to replenish your fuel.
There's a hundred billion things to do, so you won't get a precise list if you don't state specifically what you're looking for.
Also: LEARN HOW TO USE UBER!
