In the testing literature, the term load testing is usually defined as the process of exercising the system under test by feeding it the largest tasks it can operate with. Load testing is sometimes called volume testing, or longevity/endurance testing.
#1 Best Method: Caffeine. Drinking caffeine will help you stay awake while driving in a few ways. The first benefit is that caffeine is a short-term diuretic. This means it will make you want to go to the bathroom. Feeling uncomfortable is a benefit when trying to stay awake while driving and it will force you to make stops to go to the bathroom. Staying alive is worth the few minutes needed for the stops. Another unrealized benefit is the action of picking up the cup repeatedly.
Do not drive distracted. Turn off your cell phone or give it to a passenger, make sure your makeup is okay before you leave, read your newspaper before you leave, set your radio dial before you leave. In other words, don't let go of the steering wheel to eat, drink, or mess with anything. If the phone rings when you're driving, either have a passenger answer it for you, or pull over to the side of the road and answer it.