What the hell, your age is just a number... if you feel and want to do things still then go and do them, because once you get to a point you can't you'll be ever thinking "why didn't I actually go and do that".
I've still got plans on doing stuff I have on my list, okay so some of them are still on the list and I may not get to do them... but going to damn well try.
Oh... next time you have someone younger saying on the lines of 'shouldn't you be tucked up in bed with some coco', ask them as they're so late out, "do you want me to ring your mom to pick you up now?"