If you're alone in the car, try screaming. It creates an adrenaline rush. But I MUST add that none of these tricks will last for more than a couple of minutes,

If you're alone in the car, try screaming. It creates an adrenaline rush. But I MUST add that none of these tricks will last for more than a couple of minutes, and after you do them a couple of times, they stop working. Sleepy drivers start "microsleeping", which means they fall asleep for a second or so then wake up without being aware that they did it. The microsleeps gradually get longer until you start noticing---or you die or kill someone else. Don't take sleepiness on the road lightly. You can use the screaming to get yourself safely to a parking place. If you are this sleepy, pull into a busy parking lot and go right to sleep for 15 minutes (set an alarm). You're unlikely to be bothered by anyone in the first 15 minutes in a very busy, public location. They'll assume you're waiting for someone.