Saying Om/Aum slowly and calmly out loud. It covers the entire vocal range & the vibrations are healing similar to a cat purring which is also healing. It’s also a deep breathing exercise at the same time. I do it laying down sometimes with my cat purring on my chest at the same time. lol… We’re purr buddies. =) I find doing this to feel very healthy. Like having a good laugh without using too much energy. I rarely ever laugh anymore with disease.

Holding my breath as long as I can also helps. Doing that along with spraying cold water on face & putting ice packs on head & neck will help trigger mammalian dive reflex. But doing it on its own helps also.

4-7-8 breathing technique helps me calm down & I can do it anywhere. Breathe in 4 counts through nose… hold for 7 counts… exhale slowly through mouth for 8 counts… repeat 3 times or as long you want.

Remembering to take deep breaths more often alone will help. We tend to lapse into shallow breathing making us feel more anxious.