Some of the most calm people I know practice yoga. I am not always calm. In fact, sometimes I'm very high strung. But I do love a good yoga session to push my workouts a different way. I do not, however, practice every morning or even on a regular basis.
I don't have to even research the benefits of yoga to know that it makes me feel good. It makes the people who do it on a regular basis feel good. I found this quick yoga sequence that I have been trying in the morning a few times a week. It only takes about ten minutes. I hold 1, 7, and 8 for a full minute. I hold 2, 3, 4, 5, 6 for 30 seconds and then switch to the other side for 30 seconds.
I feel stretched. Mentally and physically. After doing them for a few times they were easier to hold. Also, I found doing them in my bathroom right before I shower in bare feet was easiest because of the tile.
After reading an article about how some very popular habits of successful people include peaceful meditation and exercise in the morning I thought, why no spend some time mediating? Well sitting quietly on my bed mediating only led to me quietly sleeping again. So I used my mediating time to do yoga. It's funny how quickly it clears your mind. It's a nice ten minute break in the morning. Try it if you like!