Rigid thinking is the antithesis to mindfulness. Confronting rigid thinking and even learning how to replace it with more flexible thinking leads to better health both psychologically and physically. This process takes time and practice but through the use of thought-stopping techniques and mindfulness psychological flexibility is achievable.

https://www.psychologytoday.com/us/blog/insight-therapy/201909/psychological-flexibility-core-mental-health-asset

The use of hypnosis can also benefit in the development of more flexible thinking patterns.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2752362/