Be of service. Whether you make yourself available to a friend or co-worker or you make time every month to do volunteer work there is nothing that harvests more of a feeling of empowerment than being of service to someone in need.
I have this absurd syndrome where I get these out-of-the-blue, pathetic panic attacks. It'll be in a very easy, simple scene when everything is going swimmingly, and then suddenly, bang, I'm shvitzing and can't remember my lines.