Pls write

I like books by Smullyan, such as "The lady, or the tiger?". https://www.amazon.com/LADY-TIGER-Raymond-M-Smullyan/dp/0394514661

Reading "Thinking fast and slow" will give you a better insight in how you think, potentially improving your decision making. https://www.amazon.com/Thinking-Fast-Slow-Daniel-Kahneman/dp/0374533555/ref=sr_1_1?crid=1KC9WKEPZKSOW&keywords=thinking+fast+and+slow&qid=1577018204&s=books&sprefix=thinking+fast%2Cstripbooks-intl-ship%2C222&sr=1-1

If your into or willing to try meditation, there's a book that guides you with meditation practices to improve your focus, but I am not really sure if that works. https://www.amazon.com/Attention-Revolution-Unlocking-Power-Focused/dp/0861712765/ref=sr_1_1?crid=3CEV6S14XD8ZQ&keywords=attention+revolution+alan+wallace&qid=1577018129&s=books&sprefix=attention+rev%2Cstripbooks-intl-ship%2C226&sr=1-1

"A mind for numbers" is nice i suppose. https://www.amazon.com/Mind-Numbers-Science-Flunked-Algebra/dp/039916524X/ref=sr_1_1?crid=2Y220INEUBMDA&keywords=a+mind+for+numbers&qid=1577018115&s=books&sprefix=a+mind+for+number%2Cstripbooks-intl-ship%2C225&sr=1-1

Not straight up logic or memory, but still something that could improve decision making: Superforecasting. https://www.amazon.com/Superforecasting-Science-Prediction-Philip-Tetlock/dp/0804136718

5 hours ago, Andrey1227 said:

Pls write

Attention to detail and a focus on form often helps me express myself more reasonably and meaningfully. Critical thinking needs a decent amount of rigor.

As for the rest, um... What were we talking about?