Rom 6:14 For sin shall not have dominion over you: for ye are not under the law, but under grace.
Stand on that promise. In the face of temptation, say out loud, "Sin shall not have dominion over me.
I choose to dominate over this temptation. I have dominion over sin according to the Word of GOD."
Psa 119:133 Order my steps in thy word: and let not any iniquity have dominion over me.
Make GOD'S Word a part of your very being.