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.
Working to treat your bad sleep habits can help you avoid falling asleep while driving so you do not have to worry about causing an accident. Falling asleep while driving can be dangerous, both for you and others on the road.