Use the bright address tags. The other thing you can do is make a huge design "X" or "O" on the flat side in duct tape (get the colored ones) or painters tape and mark both sides of the luggage. Do not forget to put your name and address and even your local destination on the inside of the bag. I usually make up "busines cards" on my printer and I put them in every zippered pocket. You never know what may get torn. I wouldn t buy locks. The ones that fit luggage can be popped off easier than you can put them on. They often open suitcases to inspect them and then you have no lock at all. I take some tie wraps (zip ties) in my purse and when they have opened my case I put a zip tie on them to secure them.