[chrisbennet]

I'm getting over being sick so I'me only working occasionally and only for a few hours but I used to work 5 billable hours a day (anything after that was gravy). I probably spent 7-8 hours a day at my office.

I keep a log. If I was working and you called me, I would stop the meter, talk to you and start the meter again when I started working. If you were another client I would record my hours working for them. I have a log for every client. I did not stop the clock for bathroom breaks.

[evrimfeyyaz]

This is close to my experience as well. If I want to do anything else that day, such as cook, exercise, relax for an hour, maybe practice the guitar, the maximum I can do is around five hours. For anything above that, I have to be super strict and/or give up other activities.

[chrisbennet]

I used to get most of work done in the morning when I had the most mental energy. If I could, I would avoid interruptions - answer emails after lunch, etc.