Well, I still feel like rubbish, but less like rubbish than I did yesterday, and much less like rubbish than I did the day before.
So I jumped in the deep end and rode to work this morning. Negative temperatures and all.
It's amazing - the 8 minutes each way to work made me a happier person, and put a smile (semi-smile, maybe, but the frown was definately upside down), and once again I have donned the rose coloured glasses.
Maybe cycling is the path to world peace.