If you have a history of mental illness, check with your doctor or therapist before using the resources presented here.
If any of the exercises make you feel worse, stop using them.
Grounding is a technique you can use to help keep calm. Many people use such a technique several times a day. If it helps you, keep practising it. You can adapt it in any way that works for you.
Many of us are triggered throughout the day, How well do you know yourself? Why do little things trigger us?