Influencer by Kerry Patterson, Joseph Grenny, David Maxfield, Ron McMillan, Al Switzler

In Influencer - The Power to Change Anything, the authors provide six sources of influence:

1. Make the undesirable desirable -  Most people are not good at predicting their own likes and dislikes, so sometimes simply getting them to try a new behavior will lead to enjoyment.  Another option is to make it a game with clear, frequent feedback to lead to a sense of accomplishment.
2. Surpass your limits - Relentlessly practice the essential elements of the skill.
3. Harness peer pressure - the approval and disapproval of those in our network can make an enormous difference, particularly the influence of opinion leaders.
4. Find strength in numbers - groups working together are often smarter than any extremely bright individual.
5. Design rewards and demand accountability - the rewards need to be gratifying to the recipient, closely tied to the behavior desired and delivered timely.
6. Change the environment - often this can be accomplished by making the invisible visible.  A hospital dramatically decreased the cost of the latex gloves being used, by highlighting for all to see, the cost of each glove option - $3 v. 25 cents.