I'm more than sure that I'm one of the few unlucky people who can't be kept awake through caffeine -- my doctor says this pretty normal, as caffeine doesn't have an invigorating effect on everyone. The problem is I will have to pull an all-nighter soon and I'm pretty sure I won't be able to make it through sheer willpower. So, are there any alternatives to caffeine (nothing of the illegal kind, please ), any other drinks, foods, that may help keep me awake? What do you guys recommend? Thanks in advance.