It's all well and good that you excel at child's pose, but downward facing dog is one of the most essential in the majority of yoga classes, and takes a little more effort and flexibility. Next time you feel like toppling over, cut the mouth breathing and focus on your nose, says Terri Walsh, celebrity fitness trainer and creator of the ART Method. "Downward Dog demands an even and steady breath at all times with the mouth closed. The breath is important in helping to calm the mind and focusing on the breath evenly through the nose, clears nasal passages, helps direct energy and facilitates deep concentration." Keep your inhales and exhales even to relax your neck muscles and steady your hands and feet.