Avoid coffee during night shifts.

Avoid coffee during night shifts:
November 6 2009 | Times of India Bangalore

Night-shift workers should avoid drinking coffee if they wish to improve their sleep, according to new research. A study led by Julie Carrier, a University of Montreal psychology professor has found the main byproduct of coffee, caffeine, interferes with sleep and this side-effect worsens as people age. The combined influence of age and caffeine makes the sleep of middle-aged subjects particularly vulnerable to the circadian waking signal.