So, mindfulness isn't about redirecting your thoughts to something more calm. It's about being in the moment, not getting wrapped up in some past or future experience, but just existing in the now. It sounds like poppycock, but it's actually pretty cool in practice. It's not always successful, but it's a good tool to have if you tend to get emotional. I suggest reading about how to practice and giving it a shot. You don't have to meditate to practice mindfulness. You can do it while you're driving, eating, watching television or working out. You can also practice mindfulness meditation, and you only need to for a few minutes, really. It's not like you have to sit all day on a mountain top contemplating the universe to get a better grasp of your temper. 
