I wouldn't necessarily recommend this, but a fun little game I play myself is to just outright lie. I travel *a lot* and these kinds of questions have gotten very boring for me. So, now what I do, is to concoct a story on my way to the airport and see if I can pass it off. So far, I've determined that I would be a very good spy indeed as I've told outrageous lies to security staff without ever being caught once.