When hunger strikes, why not fuel your body with foods that enhance energy and offer long-term health benefits. Good nutrition improves your focus as well as your productivity, and even affects your mood. For best results, pack your snacks with these ideas.

• Plan ahead. Think about what your day will look like, and pack accordingly. Consider a meal or a snack every 3 to 4 hours to keep your energy level steady, avoiding peaks and valleys.

• Give junk the heave-ho. Avoid junk food and processed grains; they’ll drain your energy.

• And that’s not all. Pair proteins — lean meats, poultry, fish, dairy, eggs, beans, tofu — with complex carbs (whole grain bagels, cereals, vegetables) for a long-lasting energy high. String cheese with an apple and a bit of macadamia nut butter or black bean-pineapple salsa with blue corn tortilla chips are power snacks with the nutrients you need to feel great all day.