First thing I would do is ignore you comment about the national championships since by that statement you don't think anything else can be done.
Second thing I would do is realize that my team was an NIT team at best from day one and invest more minutes in Kodi and Osby instead of destroying their sophomore and freshman years respectively. Brian Johnson would see the floor about as frequently as Bolen.
Third, I would clean house on that staff and find me some assistant coaches who know the game and love to recruit. Either single or divorced, but definitely not married.
Fourth I would attempt to learn an actual offense in the offseason instead of relying on the infamous motion. Once armed with this offense, I would spend most of the fall teaching it to my team.
Fifth I would take a year off from recruiting guards and find some SEC-caliber post players.
Sixth I would spend at least 15 minutes a day teaching my players to fight through screens. I would also invest time in teaching the principles of show and recover when your man is the screener.
Seventh I would show my team how to actually set a high ball screen. I would keep Elgin Bailey and Brian Johnson late after practice to make sure they understand this, even though Johnson would never play.
Eighth I would force my guys to run the drill where you go strong to the rim and you either hit the shot or get fouled, but no more of this dipsy do crap to try and keep from getting the shot blocked. As a companion to this drill, we would shoot free throws at the end of practice.
Ninth I would take my spreadsheet on substitution patterns and delete it from my hard drive. I would then do my best to limit my two or three best players to 30-32 minutes a game as much as possible. Anyone below that would be lucky to get 25.
Tenth I would practice over and over and over closing out on three point shooters. I mean I would do a LOT of this.
That's a start. But it would probably not lead to 10 national championships like we are about to win.