Did you know that one of the simplest ways to refresh yourself in the morning is to drink a nice tall glass of water?
When you are sleep, your body is in a short hibernation. Believe it or not, we lose water while asleep. We do this via sweating, breathing, and etc. Drinking water after you awake will not only start replenishing the water your body has lost, but it will give your insides a jumpstart for the day ahead.
So, replace that cup of Joe with a glass of water. It will do the job, probably faster than caffine ever could.