Packing
 
1.
Avoid putting the following in checked baggage
* Valuables (cash, jewelry). Don't rely on suitcase locks; they are easily    defeated.
* Critical items (medicine, keys, passport, tour vouchers, business     papers).
* Irreplaceable items (manuscript, heirlooms).
 
* Fragile items (camera, eyeglasses, glass containers). If these must be    checked, wrap them carefully in padding.
* Perishables
2.
Even if a bag is not lost, it may be delayed for a day or two. It is wise to put items that you will need during the first 24 hours in a carry-on.
3.
Lock your bags.
4.
Put a tag on the outside of your baggage with your name, home address, and home and work phone numbers. The airlines provide free stick-on tags. Most carriers also have "privacy tags" which conceal this information from passersby.
5.
Check with the airline for any limits it has on the size, weight, or number of carry-on bags.
6.
Inquire about your flight; different airplanes can have different limits.
7.
Don't pack anything in a carry-on bag that could be considered a weapon (e.g., scissors, knife).