My two usually sleep in their own rooms but tonight they're in mine (various reasons, one of which being that we're going to a hotel soon and they'll be sharing a room and I want them to get used to it). Anyway last night it took an hour and a half for them to settle (and I did get angry with them) and tonight it's an hour now and they're still hugely excited about it.
Obviously the novelty of sharing / ready beds etc is the catalyst, but any tips on how to get them to be less bonkers about it.