Simple concepts often have considerable value, and these two concepts will help you achieve leadership excellence. The first is about how you need to see your situation from multiple perspectives.
The second one can save you if you're accustomed to doing everything in-house. You should be focused on the core of what differentiates your organization from others.
The core tasks must be carried out and constantly innovated by your internal team. The rest often can, and should be, outsourced.