I hope I'm not too late to play, but this is an interesting idea. Here are a few suggestions off the top of my head:

* Manifest an object from a previous dream (preferably a NLD), and then think about why you did so, whether you got it right, whether this is actually the object you dreamed, or if you're just remembering it that way.

* Do a search for an old friend -- it must be a friend from way back who you haven't spoken to in a long time, and you must go to him/her, and not bring them to you. Also, after you find the friend, you must be satisfied that you got/created the right person.

* Start a round-table discussion with historic luminaries. You know the drill; sit folks like Einstein, Newton, Gandhi, David Bowie -- whoever you care to invite -- in a comfortable room with lots of refreshments, but this time there's a catch: you must have read at least one book by each guest in waking life (and it's okay if you don't really remember the book). Then start chatting, and don't leave until you've learned something.

That's it for now; if more come to me, I'll add them in. I hope that helped.