Also great for kids of age to carry a house key - Bracelet key, no more putting keys in your pocket. Great for jogging and wearing pocketless pants. Dude I'm 14 and I still lose house keys I need this badly.
Louis Vuitton: The art of packing: Louis Vuitton released this great interactive part on their website which teaches you how to pack. There are some useful tips available. Now only find a way to afford their bags.