The only correct answer, if you truly love and respect theatre, is to arrive 500 years before curtain. You must embark on a series of arcane rituals, combined with cutting edge time travel technology, to transport your consciousness into the past long before the theater ever existed, and then imbue them into the exact materials which will eventually be used to to create one of the seats, and then you must remain within the seat, experiencing the full history and every performance of that theater, leading up to the one you actually bought your ticket for (since you should at least buy one ticket, if not that's illegal and the time police will be after you shortly), I do recommend also looking into an X-Ray vision spell at well just so you can actually enjoy all the other performances that you won't be an empty seat for, rather than just staring at people's backs every day. Unless you like that sort of thing, I'm not gonna judge.