Tonight just as every night and daytime, my mind recycles negative thoughts. I am so used to this constant humming in the background that I am not aware of it.
Awareness is enough. And it seems you are aware of it. It is no more complicated than that. The negative thoughts are not your thoughts. They have been implanted from the outside... they come from your past. The past is no more. They are shadows of the past. Simply watching them... being aware that it is a habit... it is enough. Does it make sense to fight with one's own shadows? If you start fighting with these thoughts, as if they are real, then you give them more juice. Simple awareness (without saying this thought is bad, or that thought is good), and over time, they will slowly but surely lose their grip on you. True freedom comes as a consequence.