Lifehack.org:

Lead­ers have more power than they real­ize. They can patiently cre­ate a cli­mate of cre­ativ­ity or they can crush it in a series of sub­tle com­ments and ges­tures. Their actions send pow­er­ful sig­nals. Their responses to sug­ges­tions and ideas are deci­phered by staff as encour­age­ment or rejection.

I.E. : Ten things you don’t want to do.

via Link.