This could entail retaining specific cards that you think your opponents require or discarding cards in a way that gives them the wrong idea about your hand. In 334 Rummy, strategicmovie slots play and keen observation can make all the difference in winning. Getting the Hang of Observation. Developing your ability to observe and use the information you learn to guide your decisions is crucial to becoming a proficient player. The ability to read your opponents' moves and modify your strategy to outmaneuver them will improve with time and practice.