What do I want to do?

I am thinking of my purpose in retirement.  I am still busy with my garden, cycling and fishing.  Also supporting the kids in their activities.  I spend more time reading and watching tv.

What will make me happy?  Is the pursuit of happiness empty?  Can I do more projects i.e. build something?  Or should I explore other interest to develop?  What is life about?  Will the world come to an end?  What is the meaning of it all?  Can pursuit of philosophy or religion help?