In one sentence, describe what the following article is about:

Repeat something like “Keep calm and carry on,” “This too shall pass,” “Make it work” or “I will accept the things I cannot change.” Consider getting an app that lists these mantras, changing your desktop image to the mantra or listening to a song with your favorite mantra, like “Hakuna Matata” or “Every little thing is gonna be alright.” Mindfulness is the practice of focusing wholeheartedly on the present moment. Being mindful can improve both physical and mental health. Practicing mindfulness through meditation is an important tool in your stress-management toolbox. Here's how to do it:  Find a quiet, comfortable spot where you can sit without distractions for several minutes. Sit erect without perching or leaning back. If you are on the floor, cross your legs. If you are on a chair, position your legs in 90-degree angles. Drop your hands atop your thighs. Close your eyes or position your gaze at an uninteresting space on the wall ahead of you. Take a deep cleansing breath, in through your nose and out through your mouth. "Follow" your breath, simply noticing each inhale and exhale. Eventually, your thoughts will wander from your breath. Acknowledge this without dwelling on the thought or criticizing yourself - just return your attention to your breath. Yet another technique that can fight stress and evoke the body's relaxation response is progressive muscle relaxation. If you are often under great pressure, you may not even notice when your body starts to become tense. Practicing this exercise can help you recognize what your body feels like when it's tensed and relaxed.  Sit in a comfortable chair with your feet touching the floor. Place your hands on your thighs. Take a deep breath, letting your lower belly inflate with the inhale. Release the breath. Starting with your feet move up throughout your body tensing each muscle group, holding the tension, and then releasing the tension. As you hold the tension, notice what it feels like. Then, when you release the tension, also notice what that feels like. Practice this exercise for 15 minutes daily or whenever you encounter tension and stress.
Create a mantra. Try  mindful meditation. Engage in progressive muscle relaxation.