6. There's No Need to Reserve a Hotel Room
If you're traveling in the high season or during local holidays or major events, you could be left out in the cold. Plus, you're not likely to get the best rates, regardless of when you travel. Research — or have your travel agent research — hotels and rates, and book ahead of time.

7. It's Included in the Price
Oh really? This ties in with Bad Tip No. 1 (Assume That ... ). Be sure to have your travel agent verify and clarify what is and isn't included in your itinerary. Get what is included in writing, and bring a printout with you.

8. It's Cheap to Travel There
Sure, you might get a good deal on airfare or an air/hotel package. But what's the exchange rate, and how much do things cost? To get a better sense of the total vacation price tag, research tipping protocols and the prices of things like a cup of coffee, a hamburger, cab or public transportation fares, and museum admissions.

9. Your Health Insurance Will Cover You if You're Sick or Hurt
Did you know that your Medicare (and Medicare supplement) isn't recognized in some countries? Find out from your health insurance carrier what is covered. If needed, get a medical travel insurance policy.

10. See and Do as Much as Possible
Though your agent might think that he or she is simply encouraging you to get your money's worth, packing in too much is a fatal mistake. Slower-paced itineraries allow for downtime and the chance to linger somewhere if you like.

You may also like:

• Are you making these 5 common air travel mistakes?
• Avoid this bad financial advice.
• See the AARP home page for deals, savings tips, trivia and more.