Get your passport and currency ready because Middle Seat columnist Scott McCartney explains to savionaires how you all should travel in the Wall Street Journal Guide to Power Travel: How to Arrive with Your Dignity, Sanity, and Wallet Intact (Harper; Paperback; 320 pages; $16.99). McCartney provides several insider tips: how to find the lowest fares, where to find the cheap rates at nice hotels, and how to finagle baggage fees and upgrades. Don’t even think about booking your next luxury getaway until you have read this must-have reference guide.