Silence. Avos 3:13.
  There are many reasons for this & thus many benefits that are derived from it. 
  1- Words are so precious , they should never be wasted. They reveal who we are & form who we become. One who uses 4 words to say something that can be said in 2 is diluting ones thinking ability & weakening ones focus. Silence protects & insures our thinking. 
   2-The primary reason for speech control is - one who is wise , or one who desires to gain wisdom , does not speak in the presence of one who is greater. Avos 5:7. 
  Thus the practice of silence , even for a moment , can help us in training ourselves to be aware of Hashem which is the greatest form of WISDOM. 
Now may be a good time for a gem of Torah study.
www.GemsofTorah.com
 
