Create a 'collection of smile moments' - a brief documentation of one happy moment each day, as a reminder of the value of joy in life even on challenging days.

Adopt the 'spontaneity decision' - choose one thing each week to do something fun or joyful that wasn't planned, even if it seems unnecessary or impractical.

When a thought of regret arises about a joyful choice, remind yourself of the smile and joy it brought, and be grateful for that moment.