#2 Know how much sleep you need. Everyone is different.
#3 Practice healthy sleep habits.
#4 Plan your trips carefully, including where to stop for food, sleep and rest and some exercise.
#5 Recognize the signs of sleepiness and when you do, pull over to a safe place to rest or power nap.
#6 Develop a checklist. When you stop perform a few physical exercises, keep your vehicle at a comfortable temperature, drink water as often as possible, listen to music and mentally calculate distances, keep regular meal cycles and graze, and most importantly start your work shift with "0" sleep debt.
I sincerely hope these posts on managing fatigue while driving have helped you, and you have been able to apply some of them to your daily routines.
Be safe - and happy driving.