Our happiness in this life, the Buddha tells us, depends on what we do.  In large part what this means is, our happiness depends on what we do with our mind.  In this dharma talk, Peter Doobinin explains why it's important to look after your mind ... and how we learn to do this.  The talk was given in October 2021.

Be heedful, monks,

mindful, virtuous.
With your resolves well-concentrated,
look after your minds.
(DN 16)