This chapter is about implementing best practices. It begins by describing the various kinds of best practices and goes on to cover those situations where they are most likely to be installed successfully. The key components of a successful best practice installation are also noted. When planning to add a best practice, it is also useful to know the ways in which the implementation can fail, so there is a lengthy list of reasons for failure. Finally, there is a brief discussion of the impact of change on employees and the organization. Only by carefully considering all of these issues in advance can one hope to achieve a successful best practice implementation that will result in increased levels of efficiency in the accounting department.