This is from an Amazon review on Switch
All that said, "Switch" contains some reasonable, if sometimes common-sense, approaches to effecting change. To summarize, and paraphrase heavily, their main points:
Engage the rational mind by (1) seeking out examples of where change is working and emulating those successes in other quarters; (2) providing specific, well-defined statements of the initial steps that need to be taken in the change process; (3) clearly identifying the intended end-state and the reasons that that end-state is valuable.
Engage the emotions by (1) instilling a positive disposition in the people who must implement the changes: focus on hope and optimism, not fear; (2) "shrinking the change", i.e., show people that they're already partway to the goal; (3) capitalizing on people's sense of identity by showing them how certain behaviors align with the kind of person they naturally want to be; and (4) blocking the common belief that people are defined by inherent personality characteristics, and instead affirming that people can change and grow.
Facilitate the change by (1) tweaking the environment so that the newly desired behavior is inevitable, or at least easy; (2) similarly, creating a situation in which good habits are natural (and making use of one interesting approach to this, namely preloading decisions, i.e., setting up triggers for desired actions);and (3) using peer pressure.