Lesson 90, "We Need More Smart People": The world's challenges require individuals with mental capacities. An army of engineers and entrepreneurs is needed to rebuild infrastructure from the ground up.

Lesson 91, "Don't Think, Just Do": Encourages action over contemplation. The key is to do more.

Lesson 92, "Focus On Inputs": Emphasizes the importance of concentrating on factors within your control, leading to a calmer mindset and improved execution.

Lesson 93, "Front-end/Back-end": Discusses the two main roles in various endeavors – working on the front-end or back-end.

Lesson 94, "Leave Nothing In Your Tank": Advocates giving your all in every endeavor. If there's gas left, you haven't given everything.

Lesson 95, "Say 'NO' On A Daily Basis": The importance of saying 'NO' regularly, although no specific details are provided.

Lesson 98, "Surround Yourself With People Who Are Better": Encourages being in environments where you're not the best, emphasizing the benefits of learning from those superior to you.

Lesson 99, "No Emotions": Suggests that emotions can make you weak and advocates for taking action despite them.

Lesson 100, "Find Yourself In The Grind": Reminds us that continuous effort leads to improvement. The more you do, the better you become.