What is a healthy, natural way to stay awake when studying at college?

Emergen-C packets are effervescent, single serving packets of energy you can use while studying late at night in college. All you need to do is dump a packet into a glass of water and you have an incredibly energizing drink ready to go. Keep a bottle of this stuff next to you while you study to keep you hydrated and awake. There are about ten flavors to choose from. A box keeps forever, so you won't have to worry about them going bad. Much better for you than the caffeine in soda, tea, or coffee, too, since they deliver energy through a high dose of vitamin C and other vitamins and minerals.