Below are some excellent writing tips from very established scholars in various fields.
Ten Commandments for Scientific Publication, B. Ross Bamrish, University of Wisconsin-Madison.
Writing Tips for PhD Students, John H. Cochrane, University of Chicago
Ten Simple Rule for Mathematical Writing, Dimitri P. Bertsekas, MIT
How to Write Mathematics, Paul R. Halmos
Tips on Research and Creative Thinking.
Creative Thinking, Claude Shannon
A Stroke of Genius: Striving for Greatness in All You Do, R. W. Hamming
Careers in the Mathematical Sciences, SIAM 2023
Ph. D. Simulation Games by Mianzhi Wang.
A very cute game for simulating the road of pursuing a Ph.D.