When planning to fly, do not spray yourself with five times the normal cologne or perfume you would normally wear. Wait till you make it to your destination, because I will likely have to sit next to you.
Something else that happened on my latest trip: I learned more about the person sitting behind me on a flight, who was talking to a complete stranger (loudly I might add), than I know about my own family. The oversharing buzzer went off so much I needed to put down the book and break out the ipod.
Undoubtedly there is something I will notice, good or bad, during each of my trips. Some others are also noted by my favorite comedian Brian Regan: