I haven't done it yet, but I've considered getting a tattoo of "No storm can shake my inmost calm". It's from a traditional Christian hymn. I think most of us have a few people in our lives that make our life more difficult. Most of mine are encountered at work. I really try to handle it the best I can, but over the past year or two a few of them started to get under my skin. This lyric is a reminder to me that I'm in control of how I let them affect me.