Have you heard of the concept of a travel rule, or is it something I’ve just made up? My trip planning has had to get a bit more rigid lately. My son is now old enough that he’s required to stay in school full-time. Combine this with my obsession with Ramit Sethi’s Money for Couples podcast (he suggests you set ‘money rules’ for yourself), and I decided to try out a new rule (experiment?): if someone invites me on a trip – just go!