This pose will have your abdominals working overtime to help you stay grounded on one leg.
Shift your weight onto your left leg. Draw your right knee into your chest, grab your ankle, and press the bottom of your right foot onto your left thigh. If you feel wobbly keep your hand on your ankle while it's pressed into your thigh. If you're finding your balance really easily, press your palms together in front of your chest. Brace your abdominals in tight to your spine, making sure you can still breathe easily. Find a focal point and focus your gaze while you hold the pose for 10 long, deep breaths. Repeat on the other leg.