Drowsiness while driving (how to fight it off)

How can one fight off drowsiness while driving alone. For new years some friends an I travelled to jebal jais (I have license they don't) I made the mistake of not taking a nap and staying awake for 22 hours (uni assignments), while coming back my friends fell asleep and I was driving back home (left at 2am) on the way I was so exhausted that I for a moment closed my eyes and almost hit a guard rail (stupid of me to drive so tired thank god the roads where empty but I had to be home to sleep for duty mid shift) now I wanted to ask what to do if I'm this sleepy to not fall a sleep at the wheel again.