http://www.bbc.co.uk/news/business-28608097

I was once advised, in my first year of teaching, to say Yes to every small task that was offered/ delegated to me but to do none of them. This apparently gives the impression you're really helpful but also discourages people from giving you jobs. I never tried it, although I was so bad at doing my actual job that I barely had time not to do anything else.

Any tips?