How do you stay fit and have a busy life?

How do you go to work, have a social life, spend time with friends and family and still stay fit? Do you manage to do so? Tell us how; please! What's the secret?

Throw technology at it. Get a Blackberry or a smartphone and do your e-mails on the go. Nothing to make a train journey pass quickly than burning through loads of e-mails. Don't forget to turn it off at night, though!