Meal prepping for a balanced diet can be efficient by planning meals around a variety of food groups such as proteins, vegetables, fruits, and whole grains. Start by creating a weekly menu and shopping list, ensuring you include plenty of healthy snacks. Prepare meals in bulk, using storage containers to portion meals for easy access throughout the week. Additionally, consider batch cooking staples like grains or legumes and pre-chopping veggies to save time. Focus on nutrient density and variety to keep meals interesting while meeting dietary needs.