some people use a travel agent. but i think that is pretty out-dated. i usually do all of my research online and then use a site like Expedia to book the travel. if you are going to europe then i recommend a book like "rick steve's guide to...". i've also had good luck with lonely planet.
(i'm just teasing - i think you mean go on vacation in your games, right? :) there is a link at the bottom of every game page or in your echess settings...)
how do i set up vacation