Going to the zoo tomorrow. Think I got this stop added in there.
For now, we're enjoying some salt&straw
Better put on your walking boots, the zoo is huge.
Salt and straw I've heard is great, but I haven't made it there yet.
Hash house a go go is pretty great for breakfast but insanely large portions and not cheap. Dollar per dollar I'd probably just stop at a burrito shop and enjoy one on the beach up in north county. Cardiff/Del Mar/Solana beach would be great for that. Could head to mission beach with one but watch out for Slo-mo gliding along on the boardwalk.
Catch the sunset at sunset cliffs. Pick up a beer, throw it in the brown bag and take it in. I recommend olive tree market for this, their beer selection is really good and their sandwiches are great if you're hungry (deli closes at 5? though) . There's a park at the end that's great for a short walk. Parking in the neighborhood might be easier than on sunset cliffs blvd as well.
EDIT: Can't believe I've forgotten to mention this but since it seems like drinking beer is one of the reasons for coming out to SD you need to go to White Labs. They sell yeast to a ton of different beer breweries but the most interesting aspect is you can try beers that are brewed the same but with different yeast strains.
Yeast and Fermentation | White Labs