Change your thoughts

I am trying to do this, when a sad or bad memory sneaks in my mind and starts to break me down,  I consciously change my thoughts.  I believe that what you tell yourself becomes reality (for people that live in constant lies, that is a bad thing, they start to believe their lies) but for the rest of us, the "good guys" like me :) I will continue to think only the good and push out the bad.  I have no time for that anyway, I spend all my time loving the good people in my life.