When I buy chicken breasts (or other meats) at the store I bring them home and split them into single or family portions. I then put them in ziplock bags with different marinades. I let them sit in the fridge for an hour or two and then stick them in the freezer for the week.
in the morning I will pull out a bag from the freezer and stick it in the fridge, it gives me chicken ready to cook when I get home from a long day at work. Then I add some rice and veggies or a salad and I get a healthy portion controled meal.
I either grill my chicken on the barbque, bake for 20 min at 400 degrees, or quickly fry up in 5 minutes with a small amount of olive oil.