Attitude...
Attitude is such an important thing to get right in any and every situation that we are in and yet, it's the exact area that so many people fail to do their best in. You could say that some people appear to go out of their way to make things worse for themselves by having a negative, bad or destrcutive attitude.
We aren't taught about how to develop a positive, helpful or appropriate attitude in school and the courses provided on the subject in adult life are generally attached to a business vein of personal or professional development. So a lot...