The Seder night meal is a challenging one to pull off. Think about it. You probably have a houseful, you may have an hour at the table before the food comes out (which means you won’t want to fuss in the kitchen too much) and when it is time to eat, your guests are going to want the food on the table pronto.
My suggestion below worked really well this year. I made the matzah balls ahead of time, and warmed them in the chicken soup (which I had cooked the day before). Same thing with the kugel.
I have little doubt that you have your own traditions and secrets for the perfect Seder meal. If you do, please add them below.