Ensure you pack everything you need in-flight inside your carry-on bag while ensuring it does not exceed 5 kg or contain any prohibited objects. Pack everything else in your checked luggage while also ensuring there are no dangerous objects within.
For check-in and security control, keep all of your travel documents in a secure, but easy-to-reach pocket or bag.
Furthermore, be courteous, patient, and respectful with all Milan MXP Airport staff. Even when you’re in a hurry, be prepared to kindly answer any question the check-in desk, passport, and baggage control might ask you.