1. Do not try to stuff your 95 lb "carry on" bag into an overhead bin.
When you are comfortably seated in your aisle seat on boarding, how many of you have been clattered by a clown with a back pack who decides to turn around in a narrow aisle with said item still retained to their bodies? As some of these items have sturdy metal frames, they can inflict quite a bump!
Then after 'dismounting' the aforementioned item of luggage from his/her back, the same person will create absolute chaos by assuming the overhead bins are some kind of miniature tardis and will push, shove, throw other items in the bin around with no consideration of their contents while at the same time, creating gridlock on the boarding aircraft.
Maybe safety helmets should be issued!