There is a beginning, middle and end to everything in life. Birth/life/death. What happens in the middle controls the end. Doesn't it?

For those of you "of a certain age"...we are in the last act of our lives. Before the curtain closes and our play ends will you have lived a meangingful life? What's left for you to do to make sure of it? Is it too late or just the right time to think about and do something about it?