He who guards his mouth preserves his life, But he who opens wide his lips shall have destruction. Proverbs 13:3 (NKJV)
Ponder and brood on Proverbs 13:3 by praying in the Spirit while holding that Bible verse in mind.
Meditate by repeating these throughout the day:
I GUARD MY MOUTH AND PRESERVE MY LIFE. I SPEAK LIFE BY THE POWER OF THE HOLY SPIRIT. I OPEN MY MOUTH WITH WISDOM.