Accept No Mediocre Life by David Foster

This motivational book is written from a Christian perspective.  It has the usual chapters on commitments to being you own unique best self, seizing opportunities, excelling with what you have, and doing it now.  The book is obviously written for people several decades younger than I am.  However, I did find it worthwhile by applying the principles to aging and retirement.  For example, the chapters on conquering fears and living courageously can certainly be applied to living the final chapters of life.  The chapters on asking for help and developing a sustainable pace are helpful too.  Treating time is life is good advice for everyone. The most applicable chapter at my stage of life was the one on finishing well.