Sailing is something that everyone should aspire to do at least once in their lives - as Mark Twain declared, "Throw off the bowlines, sail away from the safe harbour... Explore. Dream. Discover." As our sailing vacations travel guide explains, some trips are very hands on, and you'll be acting as a junior crew member, literally learning the ropes. On others, you're free to relax on deck, snorkel and spot wildlife while your skipper takes care of everything.