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The five drinks mentioned are milk, hot cocoa, black tea, green tea, cold water.
I particularly like the 5th item, which said -
Drink a glass of cold water, then go for a walk outside. The water gets your blood moving and the air invigorates by stimulating the endorphins that de-stress you.
I never knew drinking a glass of cold water could actually help in de-stressing. But now that I know of it, I might make it a habit each night whenever the to-do list isn't getting any shorter and the night isn't young.