All of the above are excellent pieces of advice.
Here's one more, straight from a nursing instructor I had many years ago: If you are ever tempted to use negative or judgmental terms in your documentation, try visualizing your chart notes, in letters three inches high, displayed on the overhead in a court of law for all to see.
Believe me, it's prevented me more than once from penning remarks that I probably would have come to regret.
Dealing with human beings can be utterly exasperating; it's not easy to be completely objective when you've answered the same call light for the fiftieth time in one shift, or been threatened by a patient or family member who outweighs you by eighty pounds. Just remember, when you chart in the medical record, it's as permanent as if it were engraved, and you do NOT want those heat-of-the-moment feelings to jeopardize your case or make a jury question your professionalism if they were ever to come to light in a public arena.