T1 did a guided imagery/visualization thing with me, that I actually still use. It's like a special garden place in my mind that I can go to, and it really does help me to put myself in that place. It's like it somehow does shut out the rest of my chattering thoughts and helps me find a calm, safe, loved-feeling place. It's a very spiritual place for me, a spiritual connection place.
Deep breathing helps too.
Of course, I also run, do yoga, work in the yard, read outside in the sunshine. Those are all relaxing to me.
A cup of coffee in the morning, my chair in my quiet room, and my garden place in my mind - this is one of my favorite relaxing times.