BeveragesConfessions of a coffee addict. Polly Vernon's experience is all too familiar: "I ride the swings and roundabouts of my caffeine-altered mood like a pro. I buzz maniacally with it at certain points in the day, I snap angrily at others because of it; I wilt when my body's caffeine levels drop below a certain point, I rev up again dramatically once that's been seen to. Sometimes I drink so much that I get head spins. Other times, I drink so much that all I can do is order more."