If you purchase say fruits or vegetables and then travel with it into a different country, you can be fined literally thousands of dollars. It's absolutely ridiculous. Read of cases where a person brought in half a subway sandwich into another country, and then fined thousands for a slice of tomato or some such.
These ideas are crazy, number one do you know how far you have to off an airport to save 4-5$ dollars for an airport fee?? That’s silly, number two ultimately using an airport lounge will Cost you hundreds of dollars a year! Between high interest, rates or annual fees, or other credit card, imposed fees, and airport lounge is always an expensive option overpaying the price for food and a conventional airport restaurant. That makes no sense at all. There is one trick you can use to save time and security and that is to use less busy Tsa entry point. For example at Baltimore Washington international Southwest Airlines always has a mob going to screening, walking down towards the Delta entrance allows you to get through security much faster. Also, I learned coming back internationally if you do the online passport screening, ahead of time there is a priority lane for that upon entry back into the US.
No secrets here, just kind of regular procedures and common sense. Only deaf passengers have never heard these. Maybe a better title: Tips for people who never flew before.