That's right, I decided to quit coffee for now, because it seems to increase my adrenaline levels, which makes me shake quite a bit. I used to tolerate coffee quite well, but after drinking 3-6 large cups of coffee a day, my organism decided that it's enough.
Therefore, I decided to try tea as a replacement. The thing is that tea doesn't have the same wakening effects for me as coffee.
Nevertheless, I already plan to introduce another drug into the mix which should help me with staying awake during the day and more. I might post about it later if it's successful.
As for the type of tea I drink, I like earl grey or a herbal tea (from my mom).