To practice card counting, start by learning a system like Hi-Lo, where you assign values to cards and keep a running count. Begin slowly, then increase speed as you become accurate. Practice adjusting the count for multiple decks (true count) and develop a betting strategy based on the count. Use drills or simulators to refine your skills, and practice in distracting environments to simulate real casino conditions. Consistency and accuracy are key as you build your skill over time.