Mine is from not letting the world dictate who I am and what I do. By being true to myself even if others aren't. From following what God places on my heart to do. Through resolving the angst of the past and accepting that what it is is just that, what it is. By accepting others and how they live their lives and not casting unmerited judgement on them. From admonishing when God's Word is being ignored.
That's just a snippet of what my take is on peace. What's your take?