If neurosis is the enemy, as I've written below, relaxation is the remedy. It is both the means to overcome neurosis and the goal in the sense that the best results in any activity, creative or mundane, are achieved whilst being relaxed.
In other words, making effort is a good start but if you manage to combine effort with being relaxed you're on to a winning ticket in so far as execution and performance are concerned.
Of course, in order to be relaxed you need to first fully accept yourself for who and what you are, in both your strengths and weaknesses.
And accepting oneself requires, to a degree, knowing oneself.