I read once that each person has about ten thousand thoughts per day. We can interpret that to mean that we have at least a one in ten thousand chance of thinking one good thought every day!
Thinking right is far more than positive thinking - it is living a life that is filled with God's goodness, wisdom, and mercy. Finally, brothers, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable - if anything is excellent or praiseworthy - think about such things. Whatever you have learned or received or heard from me, or seen in me - put it into practice. And the God of peace will be with you (Phil. 4:8,9 NIV).
The first thing Paul does in these verses is to instruct us to put our minds on good things. The mind will focus on something each day. The question is what will that something be? Paul says we need to direct our minds to things that are honoring and pleasing to God. Paul calls Christians to have thoughts that are high and lofty. Bad thoughts, negative thoughts, definitely drag us to the pits as Christians. Those thoughts are not uplifting or encouraging. They tear down and divide. Not a place for Christian's to hang out. Paul does not say from now on I want you to no longer think of any bad thoughts. He chooses the positive route and tells us to think on good thoughts.
Filling our minds with God's Word each day will definitely be a positive step to good thoughts. Memorizing scripture will help us in those times when our minds are being pulled away from things which are not pleasing to God. We can focus on the scripture that has been so neatly filed away in our hearts and minds.
Concentrate on good thoughts today and remember how much God loves you.
Blessings and hugs!