This document outlines common mistakes made in pre-trial criminal proceedings in Pakistan. It discusses mistakes related to warrants, proclamations, challan submissions, case inquiries, custody orders, sureties, case property disposal, statement recordings, post-mortems, detentions, confessions, charge framing, witness summoning and more. The objectives are to familiarize participants with these mistakes, how they hinder justice, and how to avoid them to better facilitate the administration of justice.