Using a basic strategy chart can improve your chances of winning in games like blackjack by providing guidelines on the optimal decisions to make based on your hand and the dealer's upcard. To effectively use the chart, familiarize yourself with its layout, which outlines actions such as hitting, standing, doubling down, or splitting. During gameplay, refer to the chart whenever you need to make a decision, ensuring you follow the recommended strategies rather than relying on instinct or emotion.