Marcus Aurelius: Emperor and philosopher who ruled over that vast Roman Empire from 161 to 180. He wrote down his musings in an army tent (the Romans were at that time uninterruptedly at war). How special (and supportive) it is to realize that he wrote these texts centuries ago, under appalling circumstances. Read about how to overcome emotional problems and how we can deal with our transience.
The ideal book for your bedside table (Bill Clinton, Barack Obama and Fief preceded you).