Encouraging someone to relax

Encouraging someone to relax
Mellow out.(slang)
=Adopt a calm attitude.
Chill out. (slang)
 Chill. (slang)
 Keep cool. (slang)
Cool it.(slang)
Cool your jets.(slang)
Cool off.(informal)
Cool down.(informal)
Slow down.
Simmer down.
Calm down.
Be calm
Calm yourself.
Deal with it.(informal)
Hold your horses.(cliché)
Keep your shirt on.(informal)
Keep your pants on.(informal)
Take a deep breath.
Take it easy.
Take it slow.
Take a pill!(informal)
Take a tranquilizer!(informal) (Listen to its pronunciation, please)