This document covers the best practices for operation and maintenance of Distribution Transformers which may be useful for the distribution utilities. A brief description of working of Transformers, Design consideration, Best Practices and I.T. interventions have also been included in the document. This document will serve a good practicing and reference tool in the hands of field engineers for reducing the DT failure rates, reducing the downtime of the system, revenue saving and achieving 24x7 power for all.