How to be a good passenger? Treat others as you would wish to be treated yourself, of course.
Some of the FA attitudes and comments posted here make me wonder why the posters are remaining in the job: If the job is that unpleasant, and the raw material (passengers) are so intolerable, then it's possible that an alternate career path should be considered. I suppose I'll get flamed for the heresy of suggesting that some people are simply not suited to be Cabin Crew, but it's true. Unfortunately, some of them still haven't worked this out, and remain in the job.