I have found I have the same problem calming myself down when I find myself worked up. I have also been back and forth with docs on bipolar and BPD. My worst ways of dealing with these times end with pain and blood. I have found that if I can do some push-ups or squat-jumps (something that takes your whole body to push out that extra energy) then I am able to let my body rest long enough to gather my mind up. If you like to sprint that would be another good one. Me and my best friend both suffer from similar problems and once we discovered that when overly angry it is quite impossible to crab-walk and not laugh. This may or may not work without company.?? Hope this helps some.