Right now you're at:
Hehe, I'm so old, envelopes in my youth had wheels because stone tables were so heavy.
Ok, fine... then you're so old your PHONE number is 1.
Better?
Actually, No. 
Doc is So old....the second form of long-distance communication he used was a flaming arrow... because his carrier pigeons kept getting shot down by people trying to contact him.... with flaming arrows
Im so old i use partially dried pillow drool to glue beard hair to the top of my head
You're lucky, John, that you have a smooth head to glue beard hair to....
Uvah is so old.... the pillow drool that he uses to glue bear hair to his head disappears into deep wrinkles and nothing sticks.
Well, at least im not giving out peoples phone numbers
vStyler is so old.... not only can't he remember people's phone numbers to give out, he can't even remember who has the phone on.