I've learned more applicable stuff in the last 2yrs of ministry than i feel i learned in my entire educational process-- and this is one of the greatest lessons i've learned (although, like most theories application can be painful)

"Say 'No' to the Good... so you can say 'YES' to the Great..."

This practice will set you free-- and create an excellence in your ministry culture-- This post by Pastor Furtick nailed it home again for me:

Reject mediocrity.