If you have a flight coming up, make sure you're not wearing jeans or sneakers. This is the advice of flight attendants looking to upgrade passengers. It's a fine line though, you shouldn't be head to toe in Prada but you need to look smart. Funny, this hasn't worked for me in the past... but that could be because I've also been lugging as much carry on as possible, had unruly hair... oh and I guess it could also have been the three kids trailing behind as well.