A clear RSVP deadline.
A digital form for guests to fill out (First Name, Last Name).
A way to accept or decline (e.g., "Joyfully Accepts" / "Regretfully Declines").
Meal choices (if you're having a plated dinner).
A field for dietary restrictions or allergies (this is very important!).
A fun, optional question like, "What song will get you on the dance floor?