1 - Accept the emotion

2 - Take a few deep breaths to calm you down

3 - Listen to a guided meditation

4 - Go out for a walk

5 - Hug yourself or touch yourself gently to calm you down

6 - Take a notebook and write down how you feel

7 - Listen to your favorite song

8 - Call someone you love and ask for support

Here you have more ideas on what to do, and here some ideas of what you shouldn't do.