This is not applicable to all self-employed entrepreneurs. I operate a business out of my house and things are completely flipped for a night owl like myself.
I start the day with menial administrative tasks and micro-productivity (e.g. Spanish practice on duolingo, working out, stretching) because it helps give me momentum early on when my brain is barely functioning. By the afternoon / evening I can start to work on more creative pursuits such as product development, design, copywriting, etc.