Mission beach is sweet
Check out PB (obviously)
Gaslamp is really sick
Eat at Phil's BBQ by the Sports Arena, EPIC food
USS Midway is touristy and kinda interesting
Seaport village is the same
There's a lot of museums in Balboa Park
SeaWorld is ehhh
The zoo as lame as it may sound, is world famous for a reason, I still enjoy visiting
if you've got a free afternoon take the 30minute drive to Stone Brewery in Escondido and eat at their restaurant, well worth it
There's good diving/snorkeling at La Jolla coves
Or you could just get drunk in Mission Beach all week, that's always fun too