Key Metrics & Milestones (Introduction):
https://youtu.be/qQSWmEylAeE
Key Metrics & Milestones (Part 2):
https://youtu.be/PmESE4fVMVM
Key Metrics & Milestones (Part 3):
https://youtu.be/hLM3uno6TwU
The Sales vs Buying vs Purchasing Process
https://youtu.be/N-ZFwOq4Cc4