Book 14. Confessions of a Conjuror by Derren Brown.
To be honest, I don't really remember reading this. This is the bit I highlighted though, and I love it:
A poet I knew once suggested, while addressing a group of students, that the would-be versifiers improve their skills by writing a poem first thing each morning. When one of the students complained that it took her weeks to write a poem that she was happy with, and that the idea of writing one every morning seemed an impossibility, his answer was brilliant: ‘Lower your standards.’