It's almost as easy to prep 2 meals in a marinade as it is to prep one. Tonight I'm making Five Spice Coconut Chicken for dinner, but I purchased double ingredients and I prepared a second batch at the same time as the first. An added benefit of this method is that before the meat freezes, then again as it defrosts it is also marinating so you get very flavorful results.
Label 2 one gallon freezer bags.
Add marinade ingredients to each bag, smoosh the bags to mix, then add chicken to each bag.
Turn the bag over on itself and press out any excess air, then seal. I place one in a shallow container in my refrigerator, and the second I spread out flat & freeze for a future meal.
I find that things defrost more quickly when they're frozen flat this way, because they are thinner. I also measured my 9x13 baking dish and found that it's max capacity is 1 liquid gallon. So Anything I can freeze in a one gallon bag, ought to fit into a 9x13 casserole dish for baking, this opens up all kinds of possibilities for freezer meals.
Also See: The Case For Making Meal Planning A Priority
Preparing Casseroles for the Freezer
Recipes which work well with this method:
No Leftovers Fice-Spice Chicken
Easy Picnic Chicken