A post in the protein shake thread made me think about how good coffee is as a boost of energy. Coffee is great for waking you up.. at the time. However, if your body gets used to using coffee to wake up and as an energy boost, then it will always feel sluggish and tired without it. That's why you see so many people with a "coffee addiction". If you even just look at a long Star Bucks line in the morning, you'll see some of the people in the line getting very agitated and fidgeting around. Although, most Coffee supplies like Star Bucks and Dunken' Donuts do have double the amount of caffeine than what's in an average cup of coffee, and that also contributes to why people are addicted to it. Having an addiction to coffee isn't good if you're trying to quit, or you're doing work and can't get to your coffee. It can slow down your work and decrease your productivity substantially. Does anyone have any experience with drinking coffee regularly, then quitting it? Or any opinions against or for whether coffee is good for the long run of staying energized?