During my recent flight to Oregon, the difference in perspectives between ground level and 10,000+ feet really struck me. (And being the height-junkie and photographer that I am, I had to take a lot of photos as well!)
There's many ways in which we as writers can gain a new perspective...
Sometimes we must set down our work and return later when we are refreshed.
Often it helps to have an impartial person read our manuscript.
If we are struggling with a scene or character, we can seek out someone who has gone through a similar experience and ask his or her opinion.
If we are bogged down with details or direction, we can refer back to the original outline for an overall view.
Sometimes just switching POV will give us a fresh perspective.
Any other methods you can suggest?
Oh, and happy flying!