The classic: mindful breathing. The tried-and-true peanut butter and jelly of mindfulness is mindful breathing. Pay attention, on purpose, to your breath. Feel the air enter your nostrils. Note how it feels cool against the inside of your nose. Forget any “in for four counts, out for six” nonsense. Just breathe. Feel your torso expand, and then feel it contract as you breathe out. Notice that the air is warm as it leaves your nose. Then do it again.