Sunrise to start a bow and end a bow. Pat says to put the bow between you and bright light, you betcha....sit on the front step at sunrise with your coffee at your side and take your time drawing in the lines. Your eyes are more rested and better able to see details, plus it's usually a calm time when others are still asleep.
Then when you are finishing out with the sanding there you are, the sunrise, a cup of coffee, and your sandpaper out on the step again. Sight down the limbs and look for toolmarks and dings to sand away. Something kinda zen-like about it. No matter how I may curse a stave in between, those are the time I am most in love with her.