For me, I am most grounded when I can connect with people (other than my T or Pdoc). If that's not possible or doesn't work for you, other things I are:

Go out in the sun. For some reason being outside in a warm sun does wonders for my mood; go for long walks (I used to run but cant anymore); yoga/ breathing exercises; volunteer somewhere (it gets me out of m head); watch a favorite movie- for me sometimes really sad movies are cathartic; buying and preparing food; going shopping or just browsing.

I hope some of this helps...