DISTRACTIONS are a great places to start: walk, run, cook, draw, watch netflix, read, rip up recycling, draw on yourself, hold ice cubes, ... GROUNDING TECHNIQUES are good to calm down: count to 100, describe your environment, repeat a safety phrase like "i am in the present, i am safe"... EXPRESSING YOURSELF is also helpful: journal, draw, paint, sing, write poetry, talk to a friend, talk on 7Cups, call a hotline.... BREATHING: just notice your breathing and don't change it, count your breaths, practice deep breathing, MINDFULNESS and VISUALIZATION are also great to learn, you can also WAIT and play the 15 minute game where you agree with yourself to not harm int he next 15 minutes and at the 15 minute mark to reevaluate whether you will not harm, will harm or will wait 15 more minutes. You can also practice SELF SOOTHING. There are many many options. It just takes time, experimentation, and practice to begin to find and be able to use healthy coping skills that work for you.