My most important discovery has been that I have optimum hours for writing. These are between 10:00 a.m. and 2:00 p.m. For a lifetime I’ve told myself that I was a nighttime writer—it seemed romantic. But actually I’m tired at night, and that’s when I prefer to read and research. Whatever your optimum hours are, don’t cheat yourself of them. This is a daily battle. If you spend them answering the phone, attending to correspondence, etc., you’ll find yourself empty-handed and out of sorts during your low tide.