I'm usually asleep within minutes of hitting the pillow, unless the dog wants to play. It's hard to sleep with a dog laying on your face.
Yes, in between the 20 visits to the toilet.
Portraits are not perfect moments, they are staged with good lighting and flattering poses. Perfect moments are the candid shots that capture the true emotion and personality of the person. While there may not be perfect lighting you can always change that through photoshop or some other editing software.
To me, it's kind of like being a sniper. You wait, wait and wait until the perfect moment.