Using the best part of your day

Have you ever considered what part of your day you are usually most effective or productive?
Some people simply can’t read after 9pm – they just fall asleep. Others can’t read before 9am – they’re just not awake enough. Some people are their most pleasant early, others late at night.
When are you at your best each day? And, what are you doing with the best part of your day?
One way to think of this is like the first fruits of your time. Maybe that time is the time to devote to prayer and bible reading? If that’s not an issue, then maybe devote the best part of your day to your spouse and thus your marriage?
Come 20 years time, be able to look back and say, I’ve spend the best part of my days doing something really important. I’ve been a good steward of my time.