"I can fall asleep anywhere."
And that's the problem.
Just because you work shifts, doesn't mean you have to be sleepy all the time.
There's a lot you can do to get better sleep, like using room-darkening shades or unplugging your bedroom phone.
By improving your sleep, you can improve your performance at work, at home and especially on the road.
Wake Up And Get Some Sleep.
NHTSA Sleep Tips:
Establish a regular, relaxing bedtime routine.
Avoid caffeine several hours before bed.
Avoid alcohol before bed it makes it difficult to maintain uninterrupted sleep.