Idolatry is when you become the source of your own joy. Poverty of spirit is a wonderful thing.
Joy is not in things; it is in us.
When my kids are happy, I am happy.
Family prayer is the greatest deterrent to sin, and hence the most beneficent provider of joy and happiness. The old saying is yet true: 'The family that prays together stays together.'
For me, at least, all of my career goals, all of my focus, everything just shifted and the importance was my children, and that's where all the joy came from as well.
When you say, 'I enjoy doing this or that', it is really a misperception. It makes it appear that the joy comes from what you do, but that is not the case. Joy does not come from what you do, it flows into what you do and thus into this world from deep within you.
It's sad that grandkids show up at the end of obituaries, way behind the list of work place achievements, social clubs and survivors. Why last? If you've got grandkids, you know they're first when it comes to the joy in your life.