Who will I be at 75? How do I get there?

Since I work in the hospital, I see it all. Many people say that, but until you see someone stare death straight in the eye, it doesn't mean a whole lot.
And in the hospital, I see all ages, but what really interests me are the people who we refer to as "elderly." Some are happy, some are sad, some are hopeful, and some want to give up. There are few that have partners of 60 years and some with a new one of just two years. Some shine brightly and some don't have an ounce of life in their eyes. All of these encounters have led me to think...Where do I want to be when I am 75? Who do I want to be? What do I want to be? And how do I get there?
Many of you guys know more than me. Let's discuss this. Help me find out what and who you want to be. Give me advice.