Hashem Rejoices With Those Who Guard Their Tongues:

Sefer Birchas Avrohom relates that Rav Uri of Strelisk zy"a had a nusach hatefillah that included the words (in Tefilas Boruch She'amar) "hamehulal b'peh atzmo." (He is glorified with his words themselves, rather than the more common version of "hamehulal b'peh amo", He is glorified with the words of His nation.) The meaning of this is that if a person guards his words to avoid speaking pointlessly or harmfully, he is already glorifying Hashem – and one certainly glorifies Him if he uses his mouth to praise and thank Him.