Just as an experiment to see how addicted I was, I stopped drinking coffee for the past week - was a huge awakening on how dependent I was (both physically and socially). Some reflections:

- I probably could not do this if I had to go into an office

- Headaches went away after day 4

- After day 4 I felt generally sharper/more motivated

- I feel much better after workouts

I highly recommend the exercise to others, good way to explore your limitations.