A philosophical thread while the year is ending. The book you have mentioned is NOT about preparing to die BUT about how to live until you die. It's in plain, simple English from a good author of motivation books. Once you read this book, you would understand my statement. Yes, we know our time of arrival but live until the time of departure is announced suddenly out of the blue.
To me, there is little point thinking when that day will come, it is like resigning to our fate. Instead, live every day making it better than yesterday.
Forget about disguising our greed for more as saving for our family and retirement, responsibly enjoy spending what you've earned with children and family.
If anything that can crush the very soul is to be named, it is the excess emotional baggage of guilt, jealousy, grief, and grudge. Learn to unload it regularly and become wiser.
Most underestimated precious things we have in hand (until we leave earth) is time and our family around us. Learn to spend quality time with family and kids, sit with them watching a movie, have a day out with them, actively listen to their achievements and failure, make a conscious effort to grow with them rather than just watching them grow.
We came unclothed with nothing but a cry into the world and when we leave with nothing, we should have some good souls to cry after our departure and leave behind a legacy that at least a few would remember.
So, I would say, don't imagine that day but do all that you have to do as if that day is known to you in a positive way.