This is one of my favorite ways to calm and center.  It's a simple and powerful breathing technique by Dr. Andrew Weil.
With your tongue to the roof of your mouth, breath out.  Breathe in for 4 counts.  Hold for 7 counts.  Breathe out for 8 counts.  Repeat this sequence 4 times.
Use it in the morning and the evening and anytime throughout the day when you feel you need it.

“Whatever you can do or dream you can, begin it. Boldness has genius, power, and magic in it.”      ~Johann Wolfgang von Goethe 
I see this quote often and feel empowered to be using it on my website!