Spent weeks refreshing for an appointment and now I have one. Terrified of turning up and being turned away for a missing form. What do you wish you'd brought / known walking into the appointment?
Brought physical copies of literally everything, including things marked optional. Better safe than turned away over one missing form.
Good moment to flag: what you must bring to the appointment, the exact photo/fee/form specs, and what happens after submission all vary by consulate and visa type and do change. Confirm the current checklist for your specific appointment via the Visa section of your guide or the official source before you go — turning up missing one item can cost you the slot you waited months for.
The fear of being turned away over one missing form is so real, good luck at your appointment.