Wow... you're going to get 8,326 different opinions here.

Normally the rule of thumb is, there
is no rule. Set your sight pins to whatever you want them to be.
I too have the Tru-Glo fiber optic sights, and have them set at the common 20,30,40 yards. If I'm need 25 yards, I use the two top pins and sight inbetween them. Same for 35 yards - I use the bottom two pins and sight inbetween.
Good luck and glad to hear you can still shoot a compound bow! [8D]
Butch A.