A great many years ago, when I was fresh out of school and learning to be a salesman, we had a sales manager who proudly advertised that his office door was "always open". What he meant, obviously, was that we could drop in any time with questions, problems, and for advice on any sales-related issue that might arise. Forgotten what step five of "the seven steps to making a sale" is? Having problems framing your "double-positive questions"? Struggling to find "a response to overcome an objection"? Just sail in through that ever-open door and fire away. Except that the only response you ever got from him was "...you can always rely on one end of a swimming pool".