This may be an old one, but it is a good way to end the week:
A little field mouse was lost in a dense wood, unable to find his way out. He came upon a wise old owl sitting in a tree. “Please help me, wise old owl, how can I get out of this wood?” said the field mouse.
“Easy,” said the owl, “Grow wings and fly out, as I do.”
“But how can I grow wings?” asked the mouse.
The owl looked at him haughtily, sniffed disdainfully, and said, “Don’t bother me with the details, I only advise on strategy.”