I sent my characters off exploring a large building on a rainy day. Now, what should they find?
If the muse had been thus moved, I could have thrown in a bunch of random stuff, to prove significant (or be revised out) later in the story. Or if I had gotten farther along in the outlining, i could have planted stuff to be used later here. sigh. Went to outline more and see the future better.
Or another outline that was hanging fire. Know exactly how it ends. That is, how, once the problem is fixed, everything rolls out in a grand finale. Know how it begins too. The connections are a bit weak. . . sigh.