I do what Julie does too - tuna packet - easy, not so expensive 98 cents - no mess, no leftovers.  I drizzle some Walden Farms dressing over my tuna - really makes it tasty.  I also chew on a few veggies: either carrot sticks or sugarsnap peas.  Past two months, I also have a couple of strawberries.  Not sure what fruit I will have once strawberries aren't available  
When I go out to lunch I have Arby's chicken salad wrap - and eat half.  Has apples, chicken, and pecans or walnuts in it.  Tastes great.