Another tool is simply to ignore your thoughts. The anxiety you feel, the emotion comes from the body. Not the mind. This anxiety emotion feeds the anxiety ridden thoughts you think. When you ignore your thoughts you don't see yourself in them. When you don't see yourself in your thoughts, but rather awareness, peace, and joy, your body doesn't have time to give an emotion to your thoughts. All negative emotions are caused by resistence. This happens to most humans walking the earth. I don't. You then break the pattern of the ego which is resistence. Rather than resising you are the opposite. Nonresistant or acceptance. Just realize you cannot change the fact that you have anxiety or thinking thoughts you don't want to think. So why fight them? It just leads to more pain. If you accept them because you realize it is crazy to fight thoughts, which then become the past. Why worry about something that cannot be changed. If you make it a daily practice to accept whenever you feel anxiety or any other negative emotion. I promise you you'll feel great. I bet you the very first time you accept the anxiety it will then pass.