When we succeed, change occurs subtly and without fanfare. It's not a program; it's a nudge. People adopt new behaviors, they forget old ones, and it doesn't feel like we did much. It's hard, in fact, to brag about it at all.
After working for a lot of leaders, good and bad, and taking leadership roles myself, I'm convinced that this is the one thing that makes the difference: You must be willing to turn towards fear, for the greater good.
Put yourself in your staff's shoes (if you're not there already!). If you are told what to do, but aren't told why and what's in it for you, what is the impetus to do it? Why is this program worth the effort and why should you add more work to your already full plate?
Whenever you change something, it's impossible to eliminate all of the unintended consequences. But the more you can anticipate the possibilities, and be ready to deal with them, the greater your chances of success.