4 Canned tuna on whole-wheat crackers
If you don’t want to incorporate dairy into every snack, a can of tuna (packaged in water) is another great source of lean protein plus healthy Omega-3s. For about 200 calories, you can enjoy 3 ounces of light tuna and 6 whole-wheat crackers—complete with 3 grams of fiber and 20 grams of protein.