Summarize this article in one sentence.
Remain calm and maintain a poker face by relaxing your face muscles. Avoid tightening your eyes, raising your eyebrows, or smiling. Even if you perform minute facial changes, these changes can tighten your facial muscles and give your opponents an idea of your hand. If you’re worried about giving away too much with your eyes, consider wearing dark sunglasses to help maintain your poker face. However, even with sunglasses, try to keep your eyes as still as possible. Movement in your eyes can give away your emotions by triggering muscles on the side of your face. Sometimes, smiling and acting confident, having conversations with your opponents, and putting on the show of being relaxed and easygoing can be just as deceptive as the best poker face. If you act positive, you might also be able to trick your opponents into folding prematurely! Nervous tics like knuckle cracking, nail biting, and fidgeting can reveal your emotions and therefore your hand to your opponents. Remain still and silent in order to throw them off. If that doesn’t work for you, fold your hands together or bring a stress ball and squeeze it constantly. Make sure the game you’re playing is real when you record; without stakes, you might not exhibit any problematic tics. Put the camera somewhere that’s easy to forget about, to help you relax and display your tics. Play back the video and look for any emotional tells, or ask a friend to guess what cards you had at any point in the video, and take note of what made them think the way they did. No matter what kind of poker face you choose, the most important thing is that you remain consistent. Whether you’re dealt the worst hand possible or the best hand you’ve ever seen, remaining cool and maintaining your poker face will throw off your opponents!

Summary:
Relax your face and jaw. Use sunglasses to conceal your eye movements. Throw your opponents off by smiling. Master body language. Record yourself playing poker for practice. Remain consistent.