No matter where you travel, weather watching is key. Take time when planning your trip to examine the normal weather conditions for the time you are visiting. Knowing this allows you to pack properly and plan accordingly. Checking constantly will allow you to alter your plans, if necessary, due to sudden changes in forecast.
If you are traveling in a poorer country, consider purchasing a large woven sack, like the type used to transport potatoes or other vegetables. Put your bag into this sack, and it is protected from dust, bugs, and moisture. It also nicely camouflages your possesions against thieves, as they will see a bag of farm goods instead of a tourist's bag.
Having a good set of maps or road atlas can save one from a possible disaster if they get lost or electronic map devices such as GPS or smart phones run out of battery. Many things can cause electronics
Virgin Islands Vacation packages to malfunction and stop working. Having backup option can save one's trip.
These days you want to think "light" when you travel--in two different senses of the word. You want to go to a place with warm sunlight when it is dark and cold back home. You also want to think "light in weight." For instance, the hotel room will have packets of soap, shampoo, etc. Why pay the airline extra to take things you don't really need?
To exchange currency for traveling abroad, it is best to wait until you are at your destination. International airports will have kiosks to exchange your money for the country's currency. Exchanging at your own bank often comes loaded with extra charges. Using a credit or debit card abroad incurs high fees as well. Withdraw cash before you travel, and exchange it at the airport before you start your adventures.
When making airline reservations, make sure you request seat assignment. Without it, you could be fighting with other passengers over which seat you want. Or worse, you could be forced to have to take a later flight because your original flight is overbooked. When you get your seat number, make sure it is documented on your ticket.
Make sure you double or even triple check all of your reservations before you leave for your trip. Just call the hotels you are staying at or make sure none the events you were planning on going to got cancelled. You don't want to be left stranded with no where to stay or disappointed that your favorite band isn't going to play in the city you are going to visit just to see them live. There's nothing wrong with checking your plans for your trip.