You might find this article by Jack Kornfield helpful if you find yourself thinking negative, or unhealthy, thoughts.
Let Go of Unhealthy Thoughts, by Jack Kornfield
Whatever we regularly think colors our experience—all day, every day. Once we start to watch these thoughts, we discover that 90% of them are reruns! Others are about problems: ‘I need to call John about the roof again. I hope he can finally fix it.’ Some are about our preferences: ‘I like the way this person talks.’ ‘I really hate this traffic.’ Many are worry or self-evaluation: ‘Oops, I’m messing up again. How do I get through this?’ ‘Wow, I pulled that off well. I hope it was noticed!’
Our life is shaped and determined by our thoughts. Usually we are only half conscious of the way thoughts direct our life; we are lost in thoughts as if they are reality. We take our own mental creations quite seriously, endorsing them without reservation.
Often our fears don’t turn out to be accurate predictions of anything. As Mark Twain put it, ‘My life has been filled with terrible misfortunes—most of which never happened!’ When we become mindful of fearful thoughts, we see that fear is just a story accompanied by dramatic feelings. We don’t have to take the story as truth. read more