Speaking of cold weather and warming up computers... I've had my fair share of long bicycle commutes during cold winters and I always wondered whether booting up the laptop right after arriving has any effect on the long-term reliability? Like, are there any components which suffer from being activated when they're really cold?

I always leave the laptop untouched for at least 10 minutes when coming in from the cold. Don't know if it helps but it makes me feel better.