Wrap liquid containers in a plastic bag. Overpacking can damage your bags and their contents. Pack only what your luggage can comfortably hold. Be particularly careful with canvas or similar soft-sided bags. Choose luggage that is strong and lockable.
Combination locks are best.
Arrange any necessary repair or replacement of older bags before your trip. Airlines can return a misplaced bag faster if your name and address are on it. The tag is to loop around the handle of each bag you check. To be safe, aim to take one moderate size suitcase weighing about 25 pounds or less. It is permissible to carry one piece on the plane, but it must fit under the seat.