Podcast: The best leaders are not the "follow me over the hill" type, says Professor Bill George. Rather, they're the people who lead from the heart as well as the head, and whose leadership style springs from their fundamental character and values. George discusses his new book True North, co-written with Peter Sims. Key concepts include:

• Leadership style can be broken down into takers and givers. Takers are often charismatic personalities who end up making decisions to enrich their own coffers and careers. Givers, on the other hand, create value and empower employees to become leaders.
• The life of a leader can be lonely. Seek continuing help from mentors and truthful advisers.
• Authentic leadership can be taught through a series of steps that lead to self-awareness.