Sleep before work. If you work for example 10pm-6am, then stay up after work. Sleep 1pm-9pm.

I've worked many overnight positions and this worked best for me. Its tempting to go to Sleep as soon as you're off work, but you end up sleeping through most normal business hours so it's hard to get things done. Also, I feel it's better to be fresh when you start work rather than starting work after already being up most of the day.

Most people wake up and go to work, then do things after work. You can be the same way. As opposed to waking up, doing things, then going to work.