There are many motivational factors including time, money, health, fun, congestion, misanthropy before 9am and so on, but the biggest motivational is not cycliing.

About once every couple of months, for some reason or other I end up having to take the bus to work, including today. As you sit on that bus crawling along, even in a dedicated bus lane, cyclists whizz past. As the obese sweat machine tries to engulf me in their armpit I can't help but think, that should be me, I could be at work by now and it makes the blood boil. That painful memory of that feeling is what keeps me riding every day that I can.