What’s the best general stretch you do for your body?

Usually I stretch my arms up and lean back a bit to stretch my spine, and my stomach. Then I Lean forward and get my hands towards my feet to stretch my legs

There is one stretch that my choir director actually taught me. You literally stand as straight as possible and with your fingers clasped together you stretch as high as you can. You can tip-toe if you'd like. It gets all of the blood in your body flowing. Just hold it for 30 ish seconds and magic