You go to sleep, but wake up every hour or two and check the clock, so as not to miss a scheduled event such as: Going to work, Class or a Date.
I went to sleep at 8am and woke up at 10:30, 12:30, 2:30 finally 3:30pm checked the clock every time and went work to do another 12 hour shift. Clock-watching
by Burned out July 8, 2013