This document discusses four strategies for theory development in nursing: 1. Theory to practice to theory - Using an existing theory in practice and refining it based on experience. 2. Practice to theory - Developing theories by reflecting on clinical experiences through journaling and discussion. 3. Research to theory - Developing theories by conducting research and using the results to build theoretical frameworks in a inductive process. 4. Theory to research to theory - Using an existing theory to formulate research questions and modifying the theory based on the research results.