Psalm 101 is perfect for breaking unhealthy and harmful habits. If there is something that you need to release that no longer serves you then this is the Psalm for you.
“I will sing of mercy and judgment: unto thee, O Lord, will I sing. I will behave myself wisely in a perfect way. O when wilt thou come unto me? I will walk within my house with a perfect heart. I will set no wicked thing before mine eyes: I hate the work of them that turn aside; it shall not cleave to me. A froward heart shall depart from me: I will not know a wicked person. Whoso privily slandereth his neighbour, him will I cut off: him that hath an high look and a proud heart will not I suffer. Mine eyes shall be upon the faithful of the land, that they may dwell with me: he that walketh in a perfect way, he shall serve me. He that worketh deceit shall not dwell within my house: he that telleth lies shall not tarry in my sight. I will early destroy all the wicked of the land; that I may cut off all wicked doers from the city of the Lord.”
Psalm 101:1-8 KJV