1.) Before you travel, take to your travel agent or research current vaccinations required. Make sure all immunizations are up to date. Plan ahead to avoid side effects while traveling. Visit the World Health Organization for current health travel advisories around the world.
2.) Keep medications packed with you in your carry on luggage, and make sure you have enough to last the whole trip.
3.)Pack hand sanitizer or anti-bacterial wipes. Try to keep a fully stocked mini-medicine cabinet with the basics; Advil, cold medicine, etc.
4.) Check your overseas medical coverage. If the policy does not cover overseas, buy a supplemental policy.
5.) Wash your hands frequently.
6.)Use insect repellent to keep harmful insects at bay.
7.)In some countries, you may need to be careful about what you eat and drink. Eat properly and stick to foods that are well-cooked and drinks that are sealed.
8.)Try to stay healthy and fit while traveling by utilizing hotel gyms, walking and planning outdoor activities.
9.)Get enough rest.
10.) Wear sunscreen.