David,
Darrin Batisky has some of the outstanding information on the time management sheet concept and consequently is presenting a seminar at GIS next month on the topic. Perhaps find a way to get down to Pittsburgh and meet up with him this winter.
Here is a link to his Power Point from last year's conference and also to his article in the Green Section Record.
http://www2.gcsaa.org/conference/education/pres/batisky.pdfhttp://turf.lib.msu.edu/2000s/2009/090319.pdfOn a personal note, I interned at a course that used a time management system and it honestly took no more than 2 minutes at the end of each day (for which we were paid). After seeing some of the data obtained at that course it will surely open your eyes and give you a clear picture of exactly where your time, effort, and money is being spent.
I hope this helps.