Some of my favorites:

Turkey sandwich on wheat bread

Low-fat/non-fat Yogurt

Fruit dish with: melon, honeydew melon, pineapple, and red seedless
grapes

I haven't looked at other markets, but 7-11 stores carry this, and
it's a filling and quick meal, without busting your diet.

The fruit dish is especially nice with just a small packet of pepper
added to it - yum!

If your conveniece store doesn't have some of these, why not ask them
about carrying things like this?

You're the customer, and you ARE always right, remember.