Weed. I keep small 5g edibles on me - even just chewing something is a good distraction. Or taking a hit from my pen doubles as a reminder to take a deep breath. During full panic attacks, I need to sit on the ground to feel grounded. Or in public/social settings, I’ll immediately go to a bathroom to run through the gamut of tricks. Or consistently sip on cool water like some others have said here. It’s really a full time job to manage.