Sometimes, I can be a bit too much in my head. I think constantly. Meditation and breath work have been really awesome ways for me to re-center myself.
Take some time to practice taking slow deep breaths from your heart. Focus on something funny, a relaxing image or an enjoyable memory. As slowly as you can, fill your lungs until there is not more room for air. When you exhale, let out a nice ahhh sound. It does wonders for the soul.