if you have those cold packs for lunch boxes you can take left over fried/baked chicken, potato salad, cole slaw, pea salad, or even pasta salad (something along the salad but veggie made, or even a fruit salad)
thermos for some iced tea.
if you like cold pizza, take a slice.
boiled shrimp (again, make sure you have an ice pack or can put your lunch in the fridge)
couple of boiled eggs, piece of raisin bread and some apple butter.
cottage cheese and a small kid size can/container of fruit..peaches or what not.
if you don't have access to a microwave, get a wide mouth thermos. then you have more of a variety to take hot foods. fill the thermos w/ hot water and let sit w/ the lid on while you heat up whatever left overs you have, then pour out he water and add the food...spaghetti and such.
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Long suffering vassal to Xarkath, U.P. - Forever and ever