Coffee doesn't do it for me... it doesn't create more energy - it simply takes what your body is storing for later and gives it to you now. Which is good, except when the afternoon rolls around and I'm falling asleep in my chair as I pay off my energy debt.

I find green tea or oolong. Basically the only prep is adding hot water so it is easy to refill and keeps me in the zone (and with a warm drink) longer.

You raise an interesting point. I drink tea too, and I discovered surprisingly recently how much of the work is done by the heat rather than the tea. Sometimes now I just drink hot water.

Funny, I call what I drink "rocket fuel" too, but it consists of acceptable coffee, muscle milk (it could be whey protein), and dextrose. It's part of a pro-brain diet.