I have a complicated relationship with coffee because I seem to be very sensitive to it. Even if I drink it regularly, it seems to make me a bit jittery at times. I reserve it for days I really need an edge in productivity. Other days I drink tea. I used to not be able to tolerate coffee at all because it upset my stomach, but I figured out thanks to reader Mike White that I could drink paper-filtered, but not French-press coffee. There is a lot of great coffee here in Chicago, so I'm happy I know this.