As much as my parents are part of Hollywood, I have no recollection of them giving me advice about it.
In a way, a certain amount of self-criticism is a good thing, because it keeps you humble. Realizing that no matter what success you've achieved, you can still make enemies makes you humble, too.
He, who cannot forgive a trespass of malice to his enemy, has never yet tasted the most sublime enjoyment of love.