Speech produces consequences — both positive and negative. The 'fruit of the mouth' means that our words, over time, yield a harvest that comes back to us. Righteous speech produces blessing; the words and deeds of transgressors yield a harvest of violence and harm. We will eventually eat what we sow.
Memory phrase: Good words bear good fruit.
Talk about it: Have your good words ever brought something good back?
Prayer: God, help my words bring good things.