Once you have selected your items for the trip, do not put them in your checked baggage. Secure them in a sleek jewel travel case and carry them in your purse or other carry on baggage.
Always remember that prominent display of jewelry on your body can be a magnet that attracts theives. So use discretion when you dress and go out on the town. If you are traveling to developing countries, places where there is acute poverty alongside wealth, the risk of robbery increases so it is better not to stand out with an excesive display of jewelry. Also, if you are staying in a hotel it is best to keep valuables in the hotel safe. Your hotel room is locked but hotel staff can get entry to your room.
If you are going to the beach then remember that many jewelry items find their way to the sand and are picked up later by lucky collectors with metal-detectors. Rings slide off when you apply lotions, and if you are snorkeling in the ocean, the cold temperatures cause a constriction of your fingers causing rings to slip away. If you are on your honeymoon, you don't want your new rings to reach the bottom of the ocean!
While you are traveling it is good to keep your jewelry organized as this will make it less likely that you will misplace and loose some items. When you are home you have the luxury of misplacing an item and finding it a few days later, but not when you travel. One way to stay organized is to place your jewlery in a jewelry wallet with separate compartments for earrings, rings, watches and bracelets. These wallets fold up and are compact for easy and secure packing.
Despite all your bes precautions it is always possible that you may loose something during your travels, that is why it is good to carry some kind of insurance on your belongings. Don't assume that your present homeowner's insurance covers losses during travel. Check your insurance policies to see what is actually covered. Even if you do havea policy that covers travel, make sure that your insurance policy can cover the cost of what you are bringing along and if not, it is best to leave the more expensive items at home.
Follow the above-mentioned tips and then go out and enjoy your trip!