Here are my local favs:
"Stratford at the Harbor" is a great brunch cafe/restaurant. It overlooks the beautiful, walkable harbor.
"The Rooftop Bar" at Mission Pacific Hotel is open to the public on the 6th floor overlooking the ocean. Amazing views and a small lunch.
"Pannikan's" is also a great relaxing cafe in a beautiful historic building.
"Craft Coast Beer and Tacos" is a great place for good beer and delicious tacos. Relax on their wonderful patio.
Something sweet:
"Handel's Ice Cream"
"Top Gun House's Pie"