• If you mean what you can do to prevent your own panic attacks - I know of a number of people who have massage rings (aka therapy rings) and massage balls. When they feel a panic attack coming, they will use them by for example squeezing the massage ball pretty hard so it causes a slight amount of pain, and that has a similar effect. As @tomenzgg@midwest.social mentioned, the goal is to shift your attention from the panic attack.

    Also, since panic attacks are often coupled with hyperventilation, the breathing into a bag trick isn’t some TV trope, it actually works. I had to drive a friend of mine to the hospital for a severe panic attack and they did the bag thing, and I was blown away by how quickly she stopped hyperventilating and calmed down.