A three step test for godly speech

From John Piper : "Green light at the lips: 1) good for building up, 2) fits the occasion, 3) gives grace to those who hear. Ephesians 4:29"

"Let no corrupting talk come out of your mouths, but only such as is good for building up, as fits the occasion, that it may give grace to those who hear."

If only I only let things out of my mouth that passed this test..

Here's a starting point: 

"Praise the Lord!
Praise the Lord, O my soul!
I will praise the Lord as long as I live;
  I will sing praises to my God while I have my being.

Put not your trust in princes,
  in a son of man, in whom there is no salvation.
When his breath departs, he returns to the earth;
  on that very day his plans perish." (Ps 146)

Every time I let my tongue go crazy, I trust in man, in myself and my ability to persuade by nagging (for example). I can only keep my mouth shut and exercise self-control in my speech if I trust in the Lord. 

"Praise the Lord! Praise the Lord, O my soul!" Fill my heart with praise for You, and leave no room for thoughts that do not honor you!