Place your chicken breasts or thighs in a gallon Ziploc bag with all ingredients for the Lemon Herb Marinade. Seal the bag, squeezing out any excess air. Let the chicken marinate for at least one hour and up to 12 hours.
Grill or sauté your chicken depending on your preference. I'm providing instructions for both below.
To Grill
Remove each chicken breast or thigh from the bag and place on a hot grill over medium heat. Grill 5 to 7 minutes on each side or until done. Cooking time may increase if you're using bone-in chicken. (Juices should run clear.)
On the Stove
Add 2 tablespoons of olive oil to a skillet on the stove. Heat the oil over medium-high heat. (You'll know it's ready when the chicken sizzles as you place it in the pan.) Add each chicken breast or thigh to the skillet in a single layer. Cook for about 5 minutes. Flip your chicken. Cook for an additional 5 minutes. Cooking time may increase if you're using bone-in chicken. (Chicken should be firm to the touch when done and juices should run clear.)