Managing Oneself - Peter Drucker
This little book is a quick read with many great take-home points for anyone struggling to manage themselves or others.
It breaks down a few key points from which all things surrounding managing yourself exist.
Know your values
Know how you learn/perform best
Know your strengths and weaknesses
In work you should find a company that resonates with your values
In relationships of the work of the personal kind, you should know the strength and values of the other person and respect them.
I think everyone can value from considering the points in this book if they struggle to have an answer to any of the above points and it takes less than an hour to read. Pretty good for people who are already busy.