I think they are still sending them out. I just got a new(ish) one in the mail a few months ago.
Of course, it took three requests on the web site before a DVD was actually delivered.
Things we do:
1.) When we have a trip coming up, we pop the DVD in on the weekends and hit "Play All". We know the audio by heart, but it's still nice to listen to on a lazy Sunday morning.
2.) We frequently listen to our DCL playlist. Some folks like cruise-inspired music, but we prefer a playlist that has music actually heard on the ships. It's nice to be walking around on-board and recognize music from our playlist.
3.) We buy travel guides for our ports of call and try to decide if we want to do an excursion or go off on our own.
4.) We listen to the DIS Unplugged podcasts about DCL. The "DCL primer" podcast they did back in late 2010/early 2011 is really good. About 90 minutes long, very detailed and still quite accurate. They also have several other podcasts covering the Dream inaugural sailing, and full reviews of both ships. Toss in the DCL episodes on the "
Dreams Unlimited" podcast, and I dare say you have at least 12 hours of content there.
5.) We watch online videos of some of the stage shows we have already seen on the ship. It is interesting how different casts can make the same show feel different.
6.) I indulge my OCD on this board.
But as
@mandylovesdisney said, at 500 days out, eventually you are going to have to forget about it for a while. I guarantee the "magic" will be right where you left it.