The annoying side effect that came with my not good enough core belief was questioning every thought and action. Annoying because I still got the same answer, it just took longer in this round about way. There is nothing wrong with double checking but I'm sure I was doing more than that. Too much worry and too many "what ifs" attached.
I took a job in the bush cutting down trees for the saw mill to use. It was challenging but more than that there was not time to do all this double checking other than a quick glance to be sure everything was okay. An average of a tree on the ground where I wanted it for best skidding advantage every two minutes. I obviously didn't get this all the time because of adverse conditions but I did most of the time and it taught me to trust my instincts.
The odd thing is it worked because I was working with one other person who was happy with the job I did, inside a circle of other teams we never saw. Years before I had a similar high production job but it was with a crew and I was foreman and there was a lot of pressure. I had a lot of headaches and although I was as good as anyone else and there was no time to question my actions the competition and the core belief allowed me to replay each day at the end of it.
Two similar jobs, with two different outcomes. The conditions were not right for getting rid of a core belief that I never knew existed at this job, where as they were at the other. Yet I loved both jobs.
So now I let my mind do it's job and have more time to enjoy what is around me. I still, because I'm alone here, keep one eye on possibilities so I don't get hurt but I don't question what I'm doing and I very seldom replay the days actions.
And I sleep. I sleep very well most nights and adequate the rest. Everyone gets the odd bad night due to adverse circumstances. Like last night, My stray cat is hiding in the basement and talked for three hours. I couldn't herd him outside so I just went back to sleep. But now I am short three hours sleep.
PS. Positive repetition is a factor when dealing with negative core beliefs.