I know you've heard people say "just take ten deep breaths" — and if it were that easy and effective, you wouldn't be reading this. You don't need to clear your mind (hi ADHD dolphins!), but you DO need to have part of your mind pointed towards self-awareness of the state of your body and your emotions. Don't change your body's state nor your emotions, just recognize what you're feeling and acknowledge that it's okay to have those feelings
Each of these techniques helps your mind and body leverage natural stress reduction by activating the parasympathetic nervous system, which reduces heart rate, blood pressure, and cortisol levels. Parasympathetic response enables more effective emotion regulation and dopamine regulation. Co-regulation can elevate endorphin levels and oxytocin.
Try different approaches! The exact methods and components of self-regulation or co-regulation that work best for you will be unique, but you will probably find high overlap with the people closest to you (because, «quelle surprise!», you meshed best with people who co-regulate and self-regulate similarly!).