Speaking as a reforming Starbucks (or as I call it, Fourbucks) addict, my intake of caffeine has dropped dramatically since I began commuting via bike. The ride in to work wakes me up plenty, and I have more energy throughout the day as a result. I might have my first cup in the late afternoon if I have one at all. I've also found that I crave healthier foods and am eating much less junk food. This biking stuff really does wonders!