Half the Work = Twice the Fun
Not everything can be grilled in advance without compromising quality, but quite a few things can. Steak can be grilled a couple of hours before serving. Just keep it tightly wrapped in foil, then unwrap and slice just before serving. Chicken on the bone, such as drumsticks, are another thing that can be cooked in advance.
Make a Burger Bar:
Burgers are easy to cook, but dressing them up to everyone’s liking is time consuming. To make it easier on the chef, set up a “Burger Bar”, with all of the cheese and fixings. Put out a platter of grilled burgers and buns and let the guests dress them up the way they like.