A combination of patience and hard-nosed business acumen. We don't change managers for a 'quick fix', a la Spurs, but if what is happening is not leading to the ultimate vision of a well-run, financially stable successful club, things are changed - Alan Pardew, then Nigel Adkins were replaced.
Then there's the academy, and the scouting network, plus we don't make a song and dance about what is happening. When players (Lovren & Lallana) think that they can do better, we open up another avenue of talent, and make sure that any club who thinks that individual players are the reason for our success have to pay over the odds to find out that it's not true (Lovren to Liverpool, Shaw to Man Utd)
I've said too much.