Hey John,
I think what's key is to fill your mind with positive scriptures and songs! Verses about God's forgiveness and unconditional love for us. I don't know if you listen to Christian music artists much, but there's a song called Times by Tenth Avenue North that is just AWESOME to listen to when you're stuck in the middle of a rut!!
Have you tried reading the Psalms? King David was honest before God and just poured his heart out, and God answered his prayers!
Ephesians 3:17-19, "And I pray that you, being rooted and established in love, may have power, together with all the Lord’s holy people, to grasp how wide and long and high and deep is the love of Christ, and to know this love that surpasses knowledge—that you may be filled to the measure of all the fullness of God."
Romans 8:1-2, "Therefore, there is now no condemnation for those who are in Christ Jesus, because through Christ Jesus the law of the Spirit who gives life has set you free from the law of sin and death." This is SO important for Christians to remember! We often bang ourselves over the head for our mistakes, when God forgives EVERY sin through the blood of Jesus!
Hebrews 10:14: "For by one sacrifice he has
made perfect forever those who are
being made holy." I like this verse because it shows that God HAS made us perfect through faith in the blood of Jesus, even while we are in PROCESS of being made holy in our day-to-day lives!
Romans 8:31-39: "What, then, shall we say in response to these things? If God is for us, who can be against us? 32 He who did not spare his own Son, but gave him up for us all—how will he not also, along with him, graciously give us all things? Who will bring any charge against those whom God has chosen? It is God who justifies. Who then is the one who condemns? No one. Christ Jesus who died—more than that, who was raised to life—is at the right hand of God and is also interceding for us. Who shall separate us from the love of Christ? Shall trouble or hardship or persecution or famine or nakedness or danger or sword? As it is written: “For your sake we face death all day long; we are considered as sheep to be slaughtered.”[j] No, in
all these things we are
more than conquerors through
him who loved us. For I am convinced that neither death nor life, neither angels nor demons,[k] neither the present nor the future, nor any powers, neither height nor depth, nor anything else in all creation, will be able to separate us from the
love of God that is in Christ Jesus our Lord."
This is a great verse for when you are just stuck in the middle of anxiety and don't know what or how to pray! Romans 8:26-27: "In the same way, the Spirit helps us in our weakness. We do not know what we ought to pray for, but the Spirit himself intercedes for us through wordless groans. And he who searches our hearts knows the mind of the Spirit, because the Spirit intercedes for God’s people in accordance with the will of God."
I hope that these are an encouragement to you.