When Should You Keep Your Ideas to Yourself? - Marshall Goldsmith
Before speaking to your direct reports:
Look into the other person’s eyes. Ask yourself, ‘Will my ‘added value’ make this person more – or less – committed to doing a great job?’
If the answer is ‘less committed’, then ask yourself, ‘Does the value added by my contribution exceed the loss in commitment by this person?’
If the answer is ‘no’ – don’t comment.