1. How not to be arrogant---from Duryodhana
2. How not to be blindly subservient to your brother--Dushasana
3. How not to be too proud of your physical strength--Bheema
4. How not take a vow before thinking--Bhishma
5. How not to be blindly faithful to one's friend---Karna
6. Not to gamble--Yudhishtara ( Dharmaraja )
7. How not to accept hospitality from unknown persons--Shalya
8. smoldering jealousy and hate--Shakuni