HRV breathing (deep belly breathing) and "accepting" my anxiety during the breathing helped me, but one has to train consistently.
some books on the topic (by phds or mds, not wuwu-shamans):
> Invincible: How we can train our hearts to beat stress and achieve success
> The Healing Power of the Breath: Simple Techniques to Reduce Stress and Anxiety, Enhance Concentration, and Balance Your Emotions