I'm really starting to get headaches if I'm without good coffee for too long. That's probably a cue to start rethinking my caffeine intake. With my first big race around the corner I'm probably going to have to cut down so I can actually get some performance benefits from my race day intake. I used to be a high responder to caffeine, but not lately. I've developed a tolerance which I think is progressing to a dependence. That said, I am writing this while drinking a long machiato.