In his book Conformed to His Image, Ken Boa writes about using our identity in Christ to help us resist temptation:

Who we are in Christ is not shaped by what we do but by what he did on the cross and continues to do in our lives. Our performance does not determine our identity; instead, our new identity in Jesus becomes the basis for what we do.... In him, we have been granted great dignity, security, forgiveness, unconditional love and acceptance, hope, purpose, righteousness, wholeness, and peace with God. We may not feel that these things are so, yet Scripture does not command us to feel the truth but to believe it....

When we are tempted to covet, lust, lie, become envious, or succumb to any other work of the flesh, we should say "That is no longer who I am." While we are on this earth, the lust of the flesh, the lust of the eyes, and the boastful pride of life will be constant snares, but we are more than conquerors when we remember that our deepest identity is in Christ and invite him to rule and live through us.