Andre,

I am also learning how to be less negative. I am learning to recognize that such or such negative thought is coming into my mind and that I have the power to stop it. I am the master of my mind, I decide what I feed my mind with. When I feel like I am about to think negatively, I (try to) stop and replace this thought by something that makes me happy. It can be a happy memory or something I am looking forward to that makes me excited.