Online Travel | More Links in the Research Chain | nytimes.com

Last month, I outlined my methods for planning frugal trips, from setting up Google News alerts to reading local novels set in my destination. Many readers wrote in with tips of their own, including Web sites I’d never heard of or had yet to try. So I put them to the test. Up first, the battle of the booking sites. Reader Haskel suggested Mobissimo.com, whose fares, he wrote, “are very often cheaper than those on Kayak.