... the driver recognizes you when you get onto the bus to your local airport. ... you don't even look up the number of the check-in counter anymore. ... you have all your make-up in a little bag you don't even unpack anymore. ... you have various cosmetic products that are labeled in foreign languages. ... you find yourself postponing the visit to the duty free shop because you will visit a bigger or better one soon. ... you know how to say "To the airport, please" in at least one more language than you actually speak. ... you regularly schedule tasks for the time on a plane. ... you always carry your passport in your bag. ... you seriously consider buying a share of your favourite airline that doesn't have a frequent traveler programme.