Proverbs 18:21 Death and life are in the power of the tongue: and they that love it shall eat the fruit thereof.
Proverbs 15:4 A wholesome tongue is a tree of life: but perverseness therein is a breach in the spirit.
Proverbs 12:18 There is that speaketh like the piercings of a sword: but the tongue of the wise is health.
Saying "Praise GOD" throughout the day, regardless of whether or not there appears to be a reason is a good way to train the tongue to speak good and not evil, and it is always good to Praise GOD, in all things, and at all times.
And straightway his ears were opened, and the string of his tongue was loosed, and he spake plain.