More Low-cost and Free Travel Ideas >> Buy trip cancellation insurance if you think a health or personal problem will interfere with your travel schedule. Premiums starts at about $4 per $100 of coverage. >> Cruise lines generally offer free passage to anyone who can recruit 10 to 15 paying passengers. You can also cruise free as an expert on a subject suitable for a lecture series. There is demand for ornithologists, historians, and experts on the culture of the country of a cruise ship's destination. Free cruises are also available to doctors and nurses willing to be on call 24 hours a day. >> To stay for free in Las Vegas or Atlantic City, bring $3,000 cash with you. The hotel or casino will keep this money in their safe and, in return, give you a room free. >> Save when you call home: Travelers can now get a discount telephone calling card that has a flat rate of 17.5 cents per minute for interstate calls, anytime, anywhere in the country including Puerto Rico, Hawaii, Alaska, and the U.S. Virgin Islands. There are no surcharges, no monthly fees, no minimum monthly billings, and international calling is also available. The calling card is free, and is a stand-alone card, meaning that a person using the card does not have to change their long distance service. For those people who use calling cards, it will save them up to 68% over the leading competitors. For an application form, send a stamped, addressed reply envelope to: Center for Business Information Attn: Phone Card Applications 816 Elm Street, Suite 187 Manchester NH 03101-2101