We have got to see why we are not happy, why we are not peaceful. The more we see it, of course, the more we can solve the problem. And solving the problem doesn't necessarily mean going anywhere or doing anything very special, other than remembering to be peaceful . This is why the practice of meditation is so important. It is a training of the mind to be awake, to see clearly, and to have the wisdom that enables us to be peaceful.
Every meditation is a training.
Normally, if there is pain in the legs, we try to get away from it - we either move or do something, because it is annoying. But in meditation, we don't do that immediately. If one is able to remember, to abide in mindfulness, then it's just pain in the legs. We experiment with developing peace by not chasing and not fighting for a pleasant, comfortable posture. Just stop and be awake, and don't chase or fight, or dwell on aversion.