When you feel like crying, stop to take a moment to recollect yourself. Take a moment or two to take full breaths. When I start crying, I have to resist the urge to succumb to my emotions. I do that by getting out of that focus and "disconnect" from the thoughts that make me upset. Look at something else like a dog walking by, or people eating in a cafe.

There are all the basics like deep breathing, making sure you're fed and hydrated, having someone safe with you, but I like to do some woo woo shit, too. I have a collection of small stones/crystals, and when I go out, I choose which to keep in my pocket for the day. Holding them is really calming. I have a ring from my partner that I never take off to remind me he's with me, and all sort of other talismans. I carry essential oils. I have counting and tapping techniques from my therapist, as well as affirmations to repeat to myself. I'm happy to chat these if you like.