I have 1 liter of water right when I wake up as my kettle boils water for coffee. Then I drink my coffee with heavy cream. It's so thick and delicious.
Sometimes I do Greek coffee instead of American coffee, and to the horror of other Greeks, I like to add heavy cream to that, too.
My wife is Bolivian, so I also got to try coca leaf tea. It was really delicious and is a great, mild stimulant. I liked it way better than coffee, and it totally replaced coffee for me when we had it. None of the jitteriness of caffeine, just a smooth, light, clear-headed stimulation from 1g of leaf per cup.