The concept of a Lean Enterprise has proven to be extremely valuable for making companies fit for today's competitive business environment. Lean Information Management denotes the type of information management that is appropriate for such all organization. According to the paradigm of a Lean Enterprise, it is based on an integral view on people and organizations. It is thus much broader than most contemporary concepts that concentrate on data and information technology. Based on an organization-oriented definition of different types of information and the essential concepts of a Lean Enterprise, this paper develops a number of practical information management rules.