Doing something physical or creative helps me a lot.
I started whittling wood -- something I had never done before. I'd sit for hours working the wood, sanding it, just putting my full attention into it. It was very soothing.

Somehow working with my hands seems to quiet my mind. It can be anything -- whatever works for you. Clay, wood, gardening, painting, cleaning, exercising, ... just to throw out a few ideas.

Be gentle with yourself. Remind yourself it is the present.