Pour 2 cups barbecue sauce over the chicken in an airtight container or a large ziploc bag. Let it rest in the refrigerator (turning it every few hours) for at least 6 hours. I usually toss my chicken in with the sauce in the morning and it is ready to go for dinner.
If you think of it, remove the chicken from the refrigerator at least half an hour before cooking. You can still cook it straight from the refrigerator though, if you forget.
When ready to cook, preheat the oven to Broil and line a large baking sheet with foil. Spread the chicken pieces out across it. Discard the remaining marinade liquid.
Broil the chicken for 5-6 minutes on the first side and then remove from the oven and turn the pieces over. Broil another 5 minutes or so, just until the chicken is almost done. If your pieces are thicker, they will take a little longer.
Turn the pieces again (if desired) and coat well with the remaining 1 cup of barbecue sauce. Broil for another 2 minutes or so, until the meat is no longer pink and the juices run clear. Enjoy!