Efficiency is doing things right; effectiveness is doing the right things.

Peter Drucker

http://www.brainyquote.com/quotes/authors/p/peter_drucker.html

see:

http://en.wikipedia.org/wiki/Peter_Drucker

http://www.amazon.co.uk/Effective-Executive-Classic-Drucker-Collection/dp/0750685077

Essentially, effectiveness is about *doing the right thing” – this is a lesson that really should be considered. I think one must learn to master oneself.

More in this vain, the cult of Getting Things Done is a cult because people worry about it everywhere:

http://www.theatlantic.com/magazine/archive/2004/07/organize-your-life/303455/

http://www.43folders.com/2004/09/08/getting-started-with-getting-things-done

Don’t do what you want to do, do the right thing you need to do.