Write an article based on this summary:

Sit on your mat with your legs crossed or assume the lotus position. Place your hands on top of your knees or put your hands in your lap. Chant the "OM" mantra 5 to 10 times if you desire. Breathe from your diaphragm, focusing on each inhale and exhale.
Sit down with your legs in the criss-cross (applesauce) position. Make sure your butt is stable on the ground and your back is straight. If you're a little more flexible and want to do the lotus position, take your right foot and place it on your left thigh and lift your left foot onto your right thigh. If you have a knee problem, place bolsters or blankets beneath your knees so they don't get strained. If you have a back problem and can't sit up straight, lean against pillows or blankets to find a comfortable semi-upright position. As long as your spine is straight, you're good to go! Yoga meditation should not be done lying down. Although this is a relaxing position, it encourages sleep rather than concentration. Simply rest your palms face down on your knees with your fingers relaxed. If you're more comfortable with them in your lap, that's an option too. To do this with some monkish style, layer your fingers on one hand on top of the fingers on your other hand with your palms facing up. Set them in your lap up against your body and press the tips of your thumbs together to make a triangle. If you'd like, try the wisdom seal position by placing your hands palms-up on your knees and holding your thumb and index finger together. Take a deep inhale into your belly and half-speak, half-sing the mantra "OM" (which is pronounced "ohm" or "aum"). Sustain the mantra for as long as you can as you exhale. This mantra is thought to focus on purification and dissolving negativity. Inhale through your nose all the way into the bottom of your belly. Take note of your belly extending and contracting as you inhale and exhaleyour shoulders shouldn't move up and down. As you do this, you might think to yourself, "breathing in, I calm my mind and body, breathing out, I smile to my body." If you like a more structured approach, try inhaling slowly for 8 counts, holding your breath for 8 counts, and exhaling for 8 counts. There's no right way to breathe in meditation so find what works for you. If you feel strained or lightheaded from breathing a certain way, try a different way. After you become familiar with basic breathing techniques, you can practice yogic styles of breathing that energize the body (like bhastrika or kapalabhati).