I am currently writing my Masters thesis four days a week, working approximately five hours a day the days I am working. (I had complications from mononucleosis

I am currently writing my Masters thesis four days a week, working approximately five hours a day the days I am working. (I had complications from mononucleosis which temporarily screwed up my health, Post-Viral Fatigue Syndrome or somesuch). I get almost as much work done as the other Masters students in my department. In practice, I only work about 50% of a regular workweek but I'd estimate that I get about 80% of the results by being focused during the hours that I am actually there.