Give and Take by Adam Grant
https://www.amazon.com/Give-Take-Helping-Others-Success/dp/0143124986
This book has changed my life, and I rarely say that. By providing extensive evidence of the benefits of being a giver, Adam Grant explains precisely why it is better to give than to receive. I’ve incorporated Grant’s work into my speeches, I frequently talk about and recommend this book to my friends and colleagues, but most of all, I’ve been motivated more than ever to give to others and think less about myself.