Imagine being a hibernating bear and doing this in your cave: take a deep breath counting slowly to three, hold it counting to three, exhale counting to three and hold again counting to three.
Take a deep belly breath and slowly exhale making a soft hissing sound. Follow your experience, emotions and repeat until you feel a little bit calmer.
Take a deep breath, make an O shape with your lips and release the air slowly making hoo-hoo sounds.
Find a comfortable place on the floor, go on all fours and arch your back a little bit (some Yoga teachers also advise crossing your eyes during the exercise), take a deep breath in and during the out-breath stick your tongue out and make a hissing sound. Repeat.
Breathe in and slowly, but loudly, let the air out of your lungs. Sprinkle the experience with a moment of joy and allow yourself a little bit of playfulness: change your tone or volume or pretend you are singing without words.
To practice horse breath, open your mouth just a little bit, take a deep breath and make the sound of a horse while softly releasing the air.
Here is the first tip: place your hands on your lower ribs and imagine that you are a butterfly opening its wings. Slowly, softly, breathe in to see your wings open up. Repeat a few times.