I moved a year ago and have some recs for you...
Food:
Crack Shack
In n Out (if you havent before)
Oscars for fish tacos
Colimas for burrito
Carnitas Snack Shack
Grand ole BBQ Asado (long lines)
good spots for drinks/dinner: Cucina Urbana, Juniper and Ivy, Starlite, Urban Solace, Underbelly
Breweries:
Modern Times
Mikkeller
Thorn Street
North Park Brew Co.
Stone (obviously)
Coronado
AleSmith
And yes if youre doing any hiking inland, do it in the early morning or not at all. I would stick to the beaches TBQH. The further north you go, the less crowded it gets.