It includes being oblivious to unhelpful opinion and ridding yourself of self conciousness which retards our progression and serves as a way to stifle original thought through fear of ridicule. People who don't know you have no business weighing in so don't give away that energy to them. This is energy that you need.
Conformity is a slow death for the soul.
Find that center and work on it. Develop your mind and strength of character and the rest in life will come on it's own. Be good to others and it shall be returned to you many times over. It will never be forgotten.
Relax and don't stress. Do your best to work problems out but if you cannot, accept the result with grace and dignity. Perhaps things were for the best and better outcomes are ahead because of this failure.
Do not compare yourself to others and above all things be yourself.
I am still working on all of these by the way, and will be till the day I die.