The Department of State's travel website is the first place to look at when planning an overseas trip. This website has information on travel warnings, visa information, country information, and several other helpful tips for when travelling abroad.
CDC Centers for Disease Control and Prevention : Travelers' Health
Check for health updates about the countries you will be visiting before you leave the U.S. Make sure you have all necessary vaccinations. This site will help you to be aware of any outbreaks or concerns you may need to be aware of before you travel to certain countries.
Travel Publisher Websites
For travel information and ideas visit the websites of the major publishers of travel books.
This free subsciption allows you to organize your travels by turning your flight, hotel, and car confirmation emails into simple, mobile itineraries just by hitting forward. An easy to use tool to help you get organized!
USA.gov Mobile Apps
Check out the apps from the Department of State to download to your phone. Get information on airports, security, embassies and visas.
Research the weather for your travel location before you leave on your trip. This will be helpful in knowing what to pack. Enter the city you will be visiting in the search box. You can get 5 Day and 10 Day forcasts.