The Bookshelves

A man who read stacks of books needed a new bookshelf.  After some thought, he found the a space for the shelves on one end of a room.  They fit perfectly.  He put the shelves up and filled them with books.

But he had put them up in front of cupboards, which he could no longer get to.

Moral: Think about the problems you could be creating, not just the problem you are trying to solve.