I remember making a thread here covering my ageing worries... when I was about to hit 20. Now I'm 27, and I'm probably a bit more comfortable with it.

Age is just a number, really. It's how old you feel and act that really defines you. I can be serious and mature, but most of the time I act the same way I have done for most of my life. I guess it's just a case of getting more balanced. The only thing I'm worried about is getting married/ having kids - luckily there's not really any chance of that at the moment!

Oh, and it's definitely good to keep reasonably fit as you get older. If you feel fitter than you have done previously, you feel younger. Kind of.