Definitely Remember These.
Some of us are born with more common sense on how to navigate the ins and outs of this emotional rollercoaster called life better than others. Some folks, on the other hand, seem to need an instruction manual on how to best avoid instances of pure, unadulterated, entirely avoidable failure.
With that being said, the United States can be just a bit more confusing to navigate for anyone who is visiting (and even for some folks who live here), and it would sure be helpful if there were more clear and easily digestible pro tips on what to not do when you're in the United States.
Thank goodness for this AskReddit thread-inspired list that can help avoid some of those potentially disasterous social pitfalls.