Communications and Behaviour Change 
Human behaviour is a very complex area. This document draws on key sources from the disciplines of social psychology, economics and behavioural economics. COI have sought to distil this information into some key factors that are important to consider for anyone developing communications that seek to influence behaviour, and to develop a framework for applying these factors to the development of a communications strategy.
Mindspace — Influencing Behaviour through Public Policy 
Well researched publication from the Cabinet Office and The Institute for Government. Comes in two flavours — full report or ‘Practical Guide’.