Drink Ice Cold Water
You might not need any convincing on a hot summer day to do this one but trust us, drinking ice cold water is good no matter what the season. It helps with digestion and absortion and can cool your body down if it just happens to be 100* outside. You will thank us later.
Make sure you fill up your glass all the way with ice cold water. You dont want lukewarm water or even chilly water, you want the good stuff. Drink it all down, give a good "ahhhh" at the end of it and get on with your day!