My favorite stretch ever

Stand with feet shoulder width apart.
Interlace your fingers behind your back or hold a strap/belt/scarf.
Roll your shoulders back and down.  Squeeze shoulder blades toward each other.

Bend forward, knees slightly bent.  Continue to lift arms away from back and shoulders away from ears.  Breathe deeply and feel the lower back and back of legs lengthen while you open the chest and shoulders.