Cooking for party of 30 -- Getting nervous -- What can I make ahead of time?

Friday night: (1) Put all the ingredients for the meat together and put them in the fridge in a sealed container. (2) Cut up your peppers and onions and put them in the fridge in a sealed container. (3) Make the salsa dip; it'll actually be better after it sits for a day, and you won't have all that extra cleanup on the day of your event. Saturday morning: (1) Prep the mac and cheese, but don't bake it yet. (2) Prep the ziti, but don't bake it yet. (3) Take the meat out of the fridge and throw them in your slow cooker on low. They can sit all day in there! Turn up to high if you need to, but don't leave on high all day as they might dry out. (4) Make your walnut dip. (5) Get your mac and ziti in the oven. Try to time it so it's done about 3:30. While that's baking, you can set up and clean up. Good luck!