As for being with anxiety or whatever, when you are really being, you are desire-less, you don't have wanting and not-wanting, you are perfectly fine with everything, including anxiety. That's why it is called being, you are like a plant, free from desires, you are just being. Therefore, the only answer to the question "How to be with anxiety or whatever?" is you just be with anxiety or whatever.
By the way, tomorrow I will make a blog post on my Personality Cafe blog about being and desiring and how they relate together.