Here's a few easy recipes:
Brush bone-in, skin on chicken breasts with melted butter, then sprinkle on Rotisserie Chicken Seasoning (in the spice aisle). I'm pretty sure it's by McCormick.
Pound or slice boneless, skinless breast into thinner cutlets. Brush with olive oil and grill. Towards them being done, brush on some barbecue sauce. Don't put it on too early or the barbecue sauce will burn.
Pound or slice boneless, skinless breast into thinner cutlets, then marinate in bottled Italian salad dressing. Try to marinate for at least a few hours, then grill.
Pound or slice boneless, skinless breast into thinner cutlets, then brush with olive oil and sprinkle on Mrs. Dash Grilling spice for chicken. I usually bake these, but you can grill also.
I usually have it so the breast are thinner, that way they bake or grill quicker and we're usually rushed for time at dinnertime.