i also work nights , except 12 hour nights in a hospital., the things i have found that help are:
make yourself workout after work or when you get up. if i work out before i go home i tend to sleep better after a work out and a shower.
drink your water.
use nights for your fruit and veggies
take lean quasine meals
if your don't take it , don't eat it.
if your can't write it , don't eat it.
keep a journal of your work outs, feelings , etc.
i have only been on sparkteam for a few weeks, these are tips that if done work well.
you can do it.
remember to keep movin,
take stairs, instead of elevator , yes this means up.