I'm not currently seeing a therapist but when I did she taught me some great grounding techniques. She also helped me to realize that the things I was anxious about were usually things I couldn't control and through discussion I was able to see the logic of my thoughts and if the anxiety I was feeling was necessary. Honestly when I start thinking about it I use distraction techniques. I think we're all scared to die on some level, but our death isn't in our control. Our life and how we live it is.