I try to be a 'good responder.' At work, I try to answer all of my emails and phone calls the same day I get them, if even only to leave a message acknowledging their call.
As for hair, its purely genetics, consistency of your regimen (don't skip applications!), nutrition/exercise/and general outlook on life (in my opinion, although not medically proven.)
I'm a responder.. but I think my health and exercise regime that I adopted at the same time I started my hair regime has had a more positive overall personal improvement on my life and my image AND my hair situation than anything else. Just my take...