At the end of the day it's just about finding a good manager with the right qualities and having the courage to appoint them. If you start in that end you won't fail, and if you do at least it won't be because you hired the wrong person.
When Barcelona were looking for a new manager back in 06 they were on the brink of appointing Mourinho because he had the best credentials. They asked Cruyff for advice though, and he told them to go with Guardiola instead who was well-known within the club but had never managed a professional game.
