Digital Gee,
Like Webist, I find that it is on days when I least feel like getting out of bed at 5:20 that I usually perform best. It's ironic, but in any case, I use that fact to motivate myself to get up and get going I might break one of my personnal records! My actual worst times are anytime I return from a trip. I travel for business and regardless of whether I fly in at an early hour or late the next days ride is always a poor effort. I think just getting to meetings catching planes and sleeping in unfamiliar surroundings takes a greater toll than I like to acknowledge.