I run a little consultancy, and I'm about where you're at. I need to target around 4 billable hours per day for actual client work. This means I turn the clock

I run a little consultancy, and I'm about where you're at. I need to target around 4 billable hours per day for actual client work. This means I turn the clock on, start working, and when I'm finished or ready to call it quits on that particular project or task the clock is stopped. I then spend about 2 to 3 hours on administrative, misc project management, emails, research, self-improvement/learning, and personal and business projects. Somewhere in there is some fruitful and non-fruitful time wasting. On good days, I can crank out 6 hours billable, when really pushing it on deadline that can go to 8 or 10, but that wipes me out for a while afterwards.