The Devil or Satan is real. Demonic warfare is real. Angels are real. Spiritual Battle occurs everyday. You are the Prize. You are the battleground. You must realize this and engage in the fight. (1 Timothy 6:12)
God has gotten you the victory through the Lord Jesus Christ, (1 Cor. 15:57) but you must act on that fact by taking control of who dominates your life. There is no magic wand, formula, or "special grace" that makes you immune to this battle. You must engage and decisively deal with those demonic powers. Here is how:
James 4:7 (KJV)
7 Submit yourselves therefore to God. Resist the devil, and he will flee from you.
Step One: Submit yourself to God. This means you surrender your will to His will and decide once and for all to follow His instructions in all matters concerning your life. There is no other way.
Step Two: You must actively, assertively, and energetically resist the devil. You cannot ignore, entertain, or fellowship with the devil. You must literally boot him out of your life.
Step Three: He will flee from you! This is something you must believe, act on in faith and count done each time you resist him. God's Word says if you do Steps 1 and 2 then you can expect Step 3. Have faith in God's Word. Take responsibility for your life and circumstances. Take the authority God has given you in the Mighty Name of Jesus and keep the devil out!
Romans 16:20 (KJV)
20 And the God of peace shall bruise Satan under your feet shortly. The grace of our Lord Jesus Christ be with you. Amen.