Despite a lifetime of trying, I've never found anything (habit, behaviour, practice, intention, effort, achievement, circumstance, etc.) that has consistently worked to
bring about a peaceful state of mind.
I would suspect that most human beings would say the same.
I have however noticed that my peace is not actually circumstance or action related, even though I tend to frequently make that attribution.
Instead, I have found the experience of peace to be much more beautifully complex, and paradoxically, much more beautifully simple than that.