The mindset of improving your team is being able to step away and take a critical look at it. The following comes from Kentucky's John Calipari and his book "Players First: Coaching From Inside Out."
"Thinking about how you would try to beat your own team goes with the job of being coach. You put yourself into the mind of another coach as he looks at film of your games. Where are we vulnerable? What defenses have we struggled against? At what speed don't we like to play?"
This is also a great process to go through in the off-season. Take time and detail those games in which you struggled and look exactly at what areas you were deficient. Then put together clips, take extensive notes and create an action plan to improve that area for next season.