I have 6 gigs in as many weeks this Spring/Summer (1 GD gig) and it is crazy to keep on top of when they were booked (2019 or 2021), where they were booked (Ticketmaster, Gigs & Tours, venue website), and what type of ticket each gig has (postal, print @ home, e-ticket, unknown). You've got to be well organised (and slightly crazy) to go to so many gigs in such a short space of time.