Some years ago, while still in gainful employment as a college lecturer, I was appointed to a senior management post. It took about two years for me to realise it was a bad mistake - and another two to extract myself from the situation. Anyway... I was about six months in the job when a student remarked to me "You know, Martin, you don't sing in the corridor anymore!"! I was never conscious of so doing - and utterly oblivious of the fact that I'd stopped. If I'd read the symptoms as early as the student had, I might have saved myself some trouble....

Regards