Mind Hacks: Tips and Tricks for Using Your Brain - http://www.amazon.co.uk/Mind-Hacks-Tricks-Using-Brain/dp/059...
Mind Performance Hacks: Tips & Tools for Overclocking Your Brain - http://www.amazon.co.uk/Mind-Performance-Hacks-Tools-Overclo...
To improve your cognitive toolkit, understand how and why your brain processes data, and change the way you think to improve processing speed 100 times. This book tells you how.
http://www.amazon.com/Mind-Performance-Hacks-Tools-Overclock...
A good book on brain hacks like the aforementioned spaced repetition is "Mind Performance Hacks": http://www.amazon.com/Mind-Performance-Hacks-Tools-Overclock...
And another good read is "Pragmatic Thinking and Learning": http://pragprog.com/book/ahptl/pragmatic-thinking-and-learni...
You can also try this site: http://lesswrong.com This is a good section to start from: http://wiki.lesswrong.com/wiki/The_Science_of_Winning_at_Lif... Be warned, though. The writing on this site is heavily influenced by AI research so it tends to be somewhat... Vulcan, which can can be good or bad depending on your preferences.
[1] https://medium.com/@yegg/mental-models-i-find-repeatedly-use...
[2] http://www.defmacro.org/2016/12/22/models.html
[3] https://fs.blog/mental-models/
[4] https://nesslabs.com/mental-models
[5] https://amzn.to/2KiKQEg (Don't recommend)
[6] https://amzn.to/2GOHoz4 (written by DuckDuckGo founder Gabe Weinberg)
[7] https://amzn.to/31lfK4Q (A classic)
[8] https://amzn.to/31tX17l (Haven't read but recommended by others)