Nothing ruins a trip like someone breaking into your pack! Your Ipod, passport and the email of that cute traveler you met on the bus, all gone within seconds. A few well-placed travel locks can prevent this sort of hassle. Luggage locks are lightweight, compact and meant to secure zippers on your backpack, day pack or suitcase. The keep your bag secure when it's out of sight and stop pickpockets in crowded places. (These guys are so good you don't even feel them unzipping your bag). Good luggage locks should be TSA compatible and include an indicater showing when the TSA has unlocked a bag. So take a few luggage locks and keep your stuff secure.