Kalia:
I usually reserve my NWT til the end of the night but I can see the value in calling one after announcements. I might do that next time. I agree that announcements often are long and dancers wanna dance!
I like the Nils Fredland approach to the NWT "walk-through". "Face your N. Do we need to walk that through a second time?"
My NWT choices are simply those that have clean and clear starts and finishes for each figure that require very little brain power even for first-timers. All the figures have occurred at least twice in earlier dances that evening. Low piece count.
Kiss the bride
Delphiniums & Daisies
Al's Safeway Produce
A(nother) nice combo
Rendezvous
Simplicity Swing
Streetsboro daisies
Jubilation
The boys from Urbana - if you're truly confident.