I would keep office hours but then the local coffee shop would go broke, the barrista would lose her job, the importers would go into liquidation, and Jamaica`s economy would collapse.
Parkinson said: "Work fills the available time."
Forget about inputs and tasks (and time) and focus on the outputs and results you produce!
If I can get the results I need, I will always strive to be reading a book and sipping my martini beside the pool by 2 pm. Work is the fuel for my life. My life is about quality.
Gotta go ... "Two olives please!"