The internet has so many things. Here are some that I thought were good to share.
On being a student:
link Mathematics Students Resource, Dan Margalit.
link Problem Solving Strategies, Terence Tao.
link (video) How to self study pure math - a complete guide, Aleph 0.
link Mathematics Textbooks for Self Study -- A Guide for the Autodidact, Mark Tomforde.
link Meet Our Faculty (2022), Brown Computer Science.
link Career Advice, Terence Tao.
For research and aspiring academics:
link Importance of Stupidty in Scientific Research, Martin Schwartz.
link Advice for the Young Scientist, John Baez.
link Advice to a Young Mathematician, Michael Atiyah.
link My Crazy Uncle's Wacky Wisdom, Bernardo Cockburn.
link Four Golden Lessons, Steven Weinberg.
link1 (transcript) link2 (video) link3 (summary) You and Your Research, Richard Hamming.
link Paths, a project of recollection by mathematicians.