I am in the aviation industry and I travel a lot
I know a really good trick/secret/loophole which gets me priority boarding, immigration express lane and bunch of other things usually devoted for first class and business class passengers only or people with silver/gold memberships with their relevant airline.
I am too scared to share the secret as it will mean airlines/airport staff will find out eventually since everyone will try to use it and then it wont be there for me anymore.
However, as a sweetener I can share my other secret.
So 4 years ago Subway email me an offer which was buy any 600ml drink and get any 6 inch sub for free - it was a mobile offer, but the loophole is it has no expiry date.
So I can confirm I have been eating $3.80 6-inch Sub and Drink for past few years. And it tastes amazing after a good sat night out.