When I get like this, I say to myself - Am I gonna let all this stress and restlessness/anxiety take control of me...or can I try and take control of it. I try to accept what I am feeling, breathe and relax about the feelings of it all and slowly I calm down. If you have crap like I do about my past, I try and forgive and move on. Easier said than done, but with the forgiveness it is easier. I also have to acknowledge to myself sometimes that I am perhaps being too self absorbed and that is not healthy when I am feeling this way. I try to stay in the present as much as possible now too. Ruminating for me is just not healthy and really accomplishes very little.