Nutriton with a busy schedule!

Um ... aren't you a health & exercise science major?

As a fine arts major and MBA, I don't think I'm nearly qualified to answer, but most fruits will last all day without a fridge, as will raw veggies.  Another great tasting snack that will give you some more protein and (good) fats is a mixture of raw almonds, raisins, dried cherries and pistachios.

Again, this is coming from a former film student, so take it for what it's worth  

I agree with wurkit...see if you can find a way to transport stuff cold.  That changes everything.  I bring a cooler if I'm going to be gone all day.  Would be a total pain if you had to carry it everywhere, but if you've got a way to leave it in your car that might work.  I have tons of tupperware containers that I get everything ready to go in on Sunday nights and then often again mid-week.  I just make lots of chicken, broccoli, etc. all at once.  You have to learn to eat everything cold if you go this route.  Look at your options for each of your food groups... protein shakes are easy and you can bring a zip lock bag of premeasured powder and a shaker cup.  Chicken, turkey, etc. if you've got a way to keep it cold.  Carbs...fruits, whole grain breads.  Fats...I do all fat from nuts when I don't have the option to get some from oils.  Veggies...that one you've got tons of options with peppers, cucumbers, tomatoes, broccoli, etc.

 Post workout I always do protein shakes (bring a shaker cup and use the water fountain, takes time to learn to drink them without ice).  Sometimes I some carbs from fruit post workout as well.  You'll find a lot of advocates for post-workout carbs on this site.

I was a kinesiology major.

 I survive on PB&J, bagles, apples, oranges, plums, peaches. It works well for me at the end of the day at the house I'll make (microwave) a grilled chicken and have a spinach salad.

I have my lunch baggie stuffed with whole grain bagel and non-fat cottage cheese, salad and little container of dressing, my lean cuisine, fruit and cottage cheese or luna bar (or some other snack), my vitmins, my tortilla and non-fat beans, or whatever else I plan that day.

You need lots of plastic containers various small sizes (I like the screw tops the best b/c they don't leak) and of course the cold packs.

I've been carrying my lunches like this and I'm out of the house for 12 hours a day...my food is always fresh :-).