I recommend that you read this article on aarp.org by Bronnie Ware, who worked for years with those in the last few weeks of their lives. The following is a summary of the article.
Top 5 Regrets of the Dying
1. I wish I'd had the courage to live a life true to myself, not the life others expected of me.
2. I wish I didn't work so hard. [and spent more time with my family, rather than on the job]
3. I wish I'd had the courage to express my feelings.
4. I wish I had stayed in touch with my friends.
5. I wish that I had let myself be happier. Many did not realize until the end that happiness is a choice.
