This excellent, undervalued article should get more attention. According to Grenny, Maxfield, & Shimberg in MIT Sloan Management Review, applying 4 or more of the following helps increase the likelihood by ten times that the change will stick.
Their model says that there are three ways to influence: at the individual, social, or structural level. Then, there are two ways to engage people: through motivation (helping them gain motivation for the change) or through ability (helping them gain the skills needed to support the change). All together, this creates six ways to influence change. Using four or more increases the likelihood of success.