Always mention the fact that you're a senior when you first make your travel reservations. For example, many hotels offer seniors' discounts. Don't be shy about asking for discounts, but always carry some kind of identification, such as a driver's license, that shows your date of birth.
Members of AARP (formerly known as the American Association of Retired Persons), 601 E St. NW, Washington, DC 20049 (tel. 888/687-2277; www.aarp.org), get discounts on hotels, airfares, and car rentals. AARP offers members a wide range of benefits, including AARP: The Magazine and a monthly newsletter. Anyone 50 or older can join.
Many reliable agencies and organizations target the 50-plus market. Elderhostel (tel. 877/426-8056; www.elderhostel.org) arranges study programs for those age 55 and over (and a spouse or companion of any age) in the U.S. and in more than 80 countries around the world. Most courses last 5 to 7 days in the U.S. (2-4 weeks abroad), and many include airfare, accommodations in university dormitories or modest inns, meals, and tuition. ElderTreks (tel. 800/741-7956; www.eldertreks.com) offers small-group tours to off-the-beaten-path or adventure-travel locations, restricted to travelers 50 and older. INTRAV (tel. 800/456-8100; www.intrav.com) is a high-end tour operator that caters to the mature, discerning traveler (not specifically seniors), with trips around the world that include guided safaris, polar expeditions, private-jet adventures, and small-boat cruises down jungle rivers.
Recommended publications offering travel resources and discounts for seniors include the quarterly magazine Travel 50 & Beyond (www.travel50andbeyond.com); Travel Unlimited: Uncommon Adventures for the Mature Traveler (Avalon); 101 Tips for Mature Travelers, available from Grand Circle Travel (tel. 800/221-2610 or 617/350-7500; www.gct.com); The 50+ Traveler's Guidebook (St. Martin's Press); and Unbelievably Good Deals and Great Adventures That You Absolutely Can't Get Unless You're Over 50 (McGraw-Hill).