Confirm your flight(s) and accommodations a few days ahead of your day of departure. Not much is more stressful than getting bumped or confusing your flight times/hotel dates.
Be as organized as possible during your journey, and try not to rely on your memory when it comes to appointment times and such; disorganization can lead to serious stress. Along similar lines, make sure your cell phone and laptop battery are charged in advance.
Get up 15 minutes earlier than necessary in the morning, which will lead to less racing around to prepare. Likewise, ready yourself for the next morning the evening before-for instance, put out the clothes you plan to wear.
Try to avoid cutting things too close with your scheduling. Traveling can always have hold-ups and we rarely get where we're going right on time, so try to give yourself some margin for error between your arrival time and the first meeting for example.
Force yourself to live "in the moment" when not working. There's no reason you have to be dwelling on an upcoming sales pitch while you're taking a hot bath at your hotel.
Bring calming reading materials and/or meditative diversions for your down time, whether it's crossword puzzles, a book of poetry or whatever helps you relax.
Try to look ahead and not backwards during your trip, even if things aren't going your way. Reflecting on a failed presentation, for example, will only add to your anxiety and possibly have a negative effect on your next one.
