@Amir struck a chord with me in Confessions of a Cycle Commuter
"That slightly guilty feeling when, in - 1 degrees and with tired body, you opt for the bus, accentuated by seeing a surprisingly large number of cyclists braving it. Next time.... "
The week has finally caught up with me - facing a similar decision to Amir this evening (although I don't feel I have been overly exerting myself ). Apart from not cycling (a last resort) - how do folks deal with fatigue?