Thriving at College is now among the top 100 best-selling books in education on Amazon. The book contains three chapters specifically on the academic aspects of college life: the importance of diligence in courses (doing enough work out of class to keep up with what happens inside class), studying systematically rather than cramming, preparing for exams, understanding and interpreting (but not being overwhelmed by) grades, interacting appropriately with professors, pursuing work experience in your academic discipline, and more.
Principles of work-life balance are spread throughout several other chapters in the book. Check out the Table of Contents or this overview.