I have just found the perfect way to stay awake during times that your eyes deem it neccessary to start falling asleep, in return scamming you from anywhere to 5-9 hours of gaming time. Behold, candy flavored caffeine tubes!
There is 100mg of caffeine in each tube. They remind me of giant pixie sticks packed with caffeine and sugar. They are slightly expensive at a whopping $9, but hey, maybe you will stay awake during the midnight raid on Stormwind. You can purchase these at thinkgeek.com.