Have more humility. Remember you don’t know the limits of your own abilities. Successful or not, if you keep pushing beyond yourself, you will enrich your own life – and maybe even please a few strangers.
Read. As much as you can. As deeply and widely and nourishingly and irritatingly as you can. And the good things will make you remember them, so you won’t need to take notes.
Write. No amount of self-inflicted misery, altered states, black pullovers or being publicly obnoxious will ever add up to your being a writer. Writers write. On you go.