I like:

-Tuna right out of the can with mustard, lemon juice, pepper.
-Beans and tomato sauce (from the can)
-A spoonful of natural peanut butter (just peanuts, nothing added)
-Nuts
-Spinach salad with goat feta cheese and Raspberry Vinaigrette dressing, topped with flax seed.
-Brown rice crackers
-Bean and Bacon soup
-Gatorade or V8 Vegetable cocktail (Note: Gatorade is NOT low carb, I do not usually drink diet drinks since I react to artificial sweetener).
-Fruit to Go sticks
-Sesame Snaps (good for lows too)
-Corn cakes (like rice cakes but made with corn) and peanut butter

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Pre-Med Student