These are some striking ones.
FIRST, by not respecting those who love you the most. Taking them casually. Assuming they'll always be there and there are more important things at hand that merit attention. And then, slowly seeing their love and affection diminish as the poor souls fail to get any reciprocation.
|The Worst and the Best|
SECOND, by only chasing stuff that is totally temporary and has no lasting value. Each such experience will make you poorer, and hungrier. The vicious circle goes all the way down. You cannot get permanence by chasing scintillas. They may give pleasure in the "here and now", but life needs much more to be fulfilling.
THIRD, by assuming that your present skill-sets will see you through for the next decade or more, and not constantly reinventing yourself. It actually is quite easy - keep an open mind, embrace change, read a lot and love new thoughts.
FOURTH, by constantly berating and insulting your own roots. While you may think you look stylish and "in" doing that, those who truly seek originality will maintain their distance. That's one powerful treasure you are now going to miss.
FIFTH, by destroying yourself in your own eyes. And that's done by bench-marking your Chapter 1 with others' Chapter 100 or 350 or 799.
Life is too precious to be lost in worthless pursuits. Love your work, but don't lose yourself in it. Create value, but don't become worthless in doing so. Build brands, but ensure your own gets built too. Be thoroughly sincere towards your work, but don't forget detachment. Best of luck!