You need to meal plan your lunches, and every time you eat, it needs to include protein. On the weekend, buy what you need/want and do all the prep. Eg, I will make a large veggie/lentil stew on a Suday and put it in 5 containers for weekday lunches. Or, sliced turkey, and buy lettuce and tomato and wash and slice on the weekend, so at lunch you are just assembling. You could do the same with interesting salads, buy a box of spring mix, and cut and prep all your toppings, and assemble when its time for lunch. Snack is an apple with peanut butter, or a hard boiled egg, wrap turkey around a pickle, mixed berries in with Greek yogurt