Reddit reviews Straight and Crooked Thinking

My suggestions:

a) Meditation is a master key to your brain. It teaches you to observe yourself, which lets you improve faster.

b) Learn to write. I recommend short stories or articles. They will teach you eloquence, precision and concision.

c) Read about thinking. I recommend Straight and Crooked Thinking.

d) Read all kinds of stories, but particularly good ones. They will give you new life experiences from those who have lived/imagined them firsthand.

e) Do things that you haven't yet. Learn to cook. Go to foreign countries. Volunteer to help the poor. Learn a new language. Try to soak up as many diverse experiences as you can, and as far as possible, say yes rather than no to new experiences.

f) Exercise. It increases brain activity and helps you work at whatever you do for longer.

g) If you have a TV, get rid of it.

h) Pick up an artistic pursuit - eg music, drawing or dance.

i) Take a therapeutic hobby. Learn first aid, counselling, or hypnosis. You'll be able to help people, but also you'll learn how people work, which is, by inference, how you work.

My own view is that thinking is holistic, and you're better working on all aspects of yourself, rather than limiting yourself to just intellectual pursuits.

Straight and Crooked Thinking is, imho, one of the best books on the subject. It's older but has been updated recently. It's not mentioned a lot which I find odd - perhaps not well known.

https://en.wikipedia.org/wiki/Straight_and_Crooked_Thinking

https://www.amazon.ca/Straight-Crooked-Thinking-Robert-Thouless/dp/1444117181/ref=sr_1_1?keywords=straight+and+crooked+thinking&qid=1573660466&sr=8-1