Start early in the morning with a trip to the Birchwood Mint Gardens. A few years ago I planted one tiny mint plant next to one measly sprig of oregano and walked away, never even troubling to water them. Of course I knew that mint is extremely hardy, but had no idea that oregano was just as vicious. The two have been at war ever since.
Pick a handful of mint leaves, no stems.
About this much.
Rinse the leaves, and put in a jar with tea bags. Three tea bags is about right for a 2 quart jar.
Fill with cold water and seal it up.
Set it out in the sun and walk away. (What do you do if it's raining or cloudy? You still set it out and walk away. The magic just won't happen if you leave it indoors)
Come back at the end of the day...remove leaves and tea bags. Get home early? No problem. Get home late? No problem. Brewing times between 4 hours and 12 hours are acceptable. Just pour into a glass of ice and forget about the heat for a while.