My answer to your question is math. Learn to read and write proofs. Any intro to proofs will do: those employed in discrete math, the ones in analysis, the diag

My answer to your question is math. Learn to read and write proofs. Any intro to proofs will do: those employed in discrete math, the ones in analysis, the diagram chasing ones, whatever...Working with math proofs will definitely straighten out your thinking and whip your mind into shape. Some suggestions to get you started: Book of Proof by Richard Hammack: https://www.people.vcu.edu/~rhammack/BookOfProof/ https://www.people.vcu.edu/~rhammack/BookOfProof/ Discrete Math by Susanna Epp: https://www.amazon.com/Discrete-Mathematics-Applications-Susanna-Epp/dp/0495391328/ref=sr_1_5?ie=UTF8&qid=1511195716&sr=8-5&keywords=discrete+math https://www.amazon.com/Discrete-Mathematics-Applications-Sus... Mathematical Proofs: A Transition to Advanced Mathematics by Chartrand et al: https://www.amazon.com/Mathematical-Proofs-Transition-Advanced-Mathematics/dp/0321797094/ref=sr_1_1?s=books&ie=UTF8&qid=1511195770&sr=1-1&keywords=transition+chartrand https://www.amazon.com/Mathematical-Proofs-Transition-Advanc... How to Think About Analysis by Lara Alcock: https://www.amazon.com/Think-About-Analysis-Lara-Alcock/dp/0198723539/ref=sr_1_9?s=books&ie=UTF8&qid=1511195842&sr=1-9&keywords=analysis https://www.amazon.com/Think-About-Analysis-Lara-Alcock/dp/0... Learning to Reason: An Introduction to Logic, Sets, and Relations by Nancy Rodgers: https://www.amazon.com/Learning-Reason-Introduction-Logic-Relations/dp/047137122X/ref=sr_1_1?s=books&ie=UTF8&qid=1511195907&sr=1-1&keywords=nancy+rodgers https://www.amazon.com/Learning-Reason-Introduction-Logic-Re... Mathematics: A Discrete Introduction by Edward Scheinerman: https://www.amazon.com/Mathematics-Discrete-Introduction-Edward-Scheinerman/dp/0840049420/ref=sr_1_1?s=books&ie=UTF8&qid=1511195950&sr=1-1&keywords=scheinerman+discrete https://www.amazon.com/Mathematics-Discrete-Introduction-Edw... The Real Analysis Lifesaver: All the Tools You Need to Understand Proofs by Rafi Grinberg: https://www.amazon.com/Real-Analysis-Lifesaver-Understand-Princeton/dp/0691172935/ref=sr_1_1?s=books&ie=UTF8&qid=1511196441&sr=1-1&keywords=analysis+lifesaver https://www.amazon.com/Real-Analysis-Lifesaver-Understand-Pr... Linear Algebra: Step by Step by Kuldeep Singh: https://www.amazon.com/Linear-Algebra-Step-Kuldeep-Singh/dp/0199654441/ref=sr_1_5?s=books&ie=UTF8&qid=1511196099&sr=1-5&keywords=linear+algebra https://www.amazon.com/Linear-Algebra-Step-Kuldeep-Singh/dp/... Abstract Algebra: A Student-Friendly Approach by the Dos Reis: https://www.amazon.com/Abstract-Algebra-Student-Friendly-Laura-Reis/dp/1539436071/ref=sr_1_3?s=books&ie=UTF8&qid=1511196182&sr=1-3&keywords=abstract+algebra https://www.amazon.com/Abstract-Algebra-Student-Friendly-Lau... That's probably plenty for a start.