It is simple. The wellbeing comes from a total acceptance of what IS now.The reality is what you experience just now in your senses.
In practicing non-judgmentally observation of your thoughts, feelings, whatever brings you into mental CLEARITY - consciousness.
That is MEDITATION - to be in the flow of life just now. In every moment. And "let go" of all thoughts, feelings. Accept and let go.
Mindfulness gives you that skill.