You know you're old when a) your 20-10 vision is long gone and you need granny specs to read and b) you always have some damned prescription that you need to take.
I know I'm getting old, because I watched all the shows on Nick At Nite in first run airings, and half the actors from the Nickeloneon shows I watched have their own shows (Amanda Bynes, anyone?)
Seriously, I knwo I'm getting old 'cause I dress for confort and not just for style. Sure, I keep in fashion. But I don't have loads of miniskirts. The only Mini I want in life now is a Cooper