If it is just you cooking and serving, you'll definitely want to have many of the courses made ahead -- or prepared "tableside". If you often do extravagant meals, you probably already know the drill -- but if you are doing "fancy", that takes even more forethought!
I second the question about what kinds of foods would be favorites, and also ask where you are located (what season is it? what is fresh and local there?).
For me, in sultry South Carolina, I've got Frozen Lemon Cream Sandwiches on my mind. (There are at least four recipes in the EYB library with this name, and two--likely identical--are online. Lemon, creme fraiche, frozen, made ahead of course .... sounds perfect to me!