“If you don't control your mind, someone else will.”
The only thing you can control in the world is your thoughts (after careful practise) and to an extent your actions. I started off trying to combat my depression and negative thinking patterns through mindfulness (good explanation here). And I found a free 6 week mindfulness course.
Mindfulness can help you be aware of your emotions, thoughts and feelings but not necessarily act upon them or own them completely as your thoughts. It also encourages one to be present in the moment (i.e. not obsessing about what something in the past or something in the present) I think this process is important so that as individuals we can develop better emotional intelligence about our and others feelings, it can give us the edge we need to detach ourselves from anger, rage and even depression.
Mindfulness, I think, is the first step in the right direction of having a happy, care free mindset.