That, he explains, is a running tally of how he’s spending his time, and whether he’s sticking to a big goal he set for himself years ago: to spend 50 percent of his workdays on creative pursuits like research and writing books, 30 percent on teaching-related activities, and 20 percent on all the other things he has to do.

These aren’t ballpark guesstimates. Mr. Collins, who is 51, keeps a stopwatch with three separate timers in his pocket at all times, stopping and starting them as he switches activities. Then he regularly logs the times into a spreadsheet.

For Jim Collins, No Question Is Too Big - NYTimes.com (via David Kang)