Mindfulness practice is pretty simple: to watch the mind with as little interruptions as possible, and to filter the unwholesome thoughts that can have such disastrous consequences. As one becomes more refined in the practice, the definition of unwholesome thoughts expands to eventually include all thoughts.
I heard before about the various similes that describe the mindful attitude, and one in particular has been resonating with the way I feel currently about practice. The image of the gatekeeper or the watchman speaks volume about the need to not let up one's attention. Trouble inevitably arises when one stops watching the thoughts arising. From there to moods, and then wrong action, it does not take much.
It gives me peace knowing that is all that's required. To remember to watch the mind. That is our utmost responsibility, for ourselves, and also for those around us. The rest will unfold on its own accord.