Well, I always have to have my cheerios for breakfast so that's what I would bring for that. There's also bagels and cream cheese, muffins, eggos, fruit, orange juice and I think some people have done scrambled eggs in the microwave. I've also seen frozen breakfasts in the store.
For lunch i've brought those crackers with peanut butter on them, apple slices, cheese, yogurt, bagels. Vons also has premade 6 layer dip (refried beans, cheese, guac, sour cream, salsa etc) that I think is pretty good that you can eat with tortilla chips. I'm not sure if they have it online but it's in the deli section in the store. Or you could make your own dip if you bought all the ingredients (just remember to bring a can opener) Or, along those same lines, you could make burritos.