Concept
Hell Yeah or No
2 books in the library reach for this idea - each in its own way. When independent authors converge on one concept, it usually deserves attention.
Anything You Want
How this book uses it: If you're not saying "hell yeah" about an opportunity, say no. Applies to projects, hires, and partnerships.
Hell Yeah or No
How this book uses it: If you're not genuinely excited about an opportunity, decline it. Your enthusiasm is information.