1. Set up a reasonable plan for what you plan to do over vacation. If you plan to workout for two hours every day, you're probably going to get discouraged and fall off the wagon. If you don't think about it before hand, you'll probably get so distracted by vacation activities that you won't fit it in.
2. Indulge at meals but don't overdo it. Having the vacation mindset of having whatever you want whenever you want may make you feel sluggish and won't want to run. Make sure you keep some consistency to your meals, but allow some room for fun-- you are on vacation after all.
3. Check out what is available for alternative fitness activities where you're going. Does your hotel have yoga every morning? Are you staying in a mountainous area perfect for hikes? To break up the monotony of your daily routine, try integrating some activities that you don't usually try.
4. Get a workout buddy. It's always good advice to have a partner to help motivate you, but especially on vacation, if you're able to partner with your spouse or your friends or whomever you're traveling with, you can make a commitment to each other to get your runs in.
5. Hydrate! It's easy to become dehydrated if you're leaving your cold, snowy home environment and suddenly it's 80 degrees outside. Make sure you take some fluids with you or bring money along to buy something on the way.
6. Plan to take the scenic route. If you love running on the beach, take your shoes off and dig your toes in the sand. If you are staying on a lake, do a few loops around the water. Take advantage of the beautiful surroundings.
7. Enjoy yourself. And if you allow yourself to slip off course, then just get back on track when you return. One week won't do in your training plan. It's best to stay on course, but don't get discouraged if you stray a bit. Make today the first day of the rest of your training.