You're feeling pretty proud of yourself, strolling into work, carrying your new with a lunch you packed from home — take that, crazy calorie counts at cafes! But wait — your lunchbox is filled with an 800-calorie serving of homemade mac and cheese. Yikes! While bringing lunch from home can be healthier than heading out at noon, it doesn't mean it's automatically the magic key to dropping pounds. Follow these three tips when packing lunch to ensure you lose weight.