Keep a daily routine
A person who works the night shift can try to re-train his circadian (24-hour) rhythm, to adapt to the new work hours.
Have a darkened, quiet bedroom just for sleeping. Aim for 7-8 hours of real sleep
, after winding down when off work. Avoid letting activities creep into the sleep time. Lack of sleep is dangerous, causing mistakes in judgement, more errors at work, and car accidents in commuting.