I don't eat much fruit- I eat more veggies. I eat fruit a few times a week, since I am on south beach I try to only have fruit a few times a week, I stick with berries mostly since they are lower sugar/carb.
Buy what you will eat or fruits that last- apples and oranges last a long time IMO. Strawberries are something you need to eat in a few days. When I get home I'll prep my strawberries so I can eat a few whenever I feel like it. If I want to eat it with my lunches I pack them in tupperwares for the next few days
Oh and when I do buy apples I buy like 2 or 3, I don't buy a lot.