I drove thru our local college town yesterday; it must be orientation as all the optimistic new students were walking around campus with their parents. I must not know how to "age" people any more as most of the students looked like they should be in Middle Grade School vs. college.
I remember back to thinking when 30 was old.
To me age is a state of mind -- I usually don't think about it but every now and again I get reminders that I'm not the young buck anymore.
A couple more off the top of my head -- You know you are old when:
You make noise when you sit down (or stand up).
Your kids can fix all your IT issues.
You can afford to buy a pinball machine!
Anyone else have any more to add?