Official releases go live 30 days out at 09:00 CET — set an alarm and book the Full Experience. Otherwise a licensed small-group tour holds allocation; it's the paragraph everyone hates that works.
Rome
Vatican on a Sunday — free entry or trap?
Accepted answer
Free, real, and the longest queue you will ever stand in. Be there 07:30 or accept a paid Friday-evening slot instead — the night openings are the actual secret.
Trastevere dinner that isn't a menu with photos?
Accepted answer
Da Enzo al 29 at opening (19:30 sharp, queue at 19:00) or Osteria der Belli for the Sardinian fish. If the menu has photos, keep walking.