Never Split the difference from Chris Voss is a good book. Persuasion and negotiation are also as much about effective listening. Something I've practiced hard this year is to be mindful of creating a pause before I respond. Pause for like 2 seconds.
Forget stock picking, it is generally a fool's errand.
Also - Tony Robbins did a good job with his book "Money: Master the game". Look up the "All weather strategy" from Ray Dalio referenced in that book. Diversification across non-correlated assets, compounded over time creates wealth.
My personal recommendation for learning to give better presentations is to just do it. Start your own little tech convention and do as much public speaking as possible. You get the "bystander effect" at social events when someone has to say something to a crowd but nobody wants to do it, so step up and get some practice! People don't judge you for errors nearly as much as you think.
As for written communication, Markel's Technical Communication was used in my English class in college and I remember getting a lot out of following its directions. As you might expect, it's very well written. Of course, I had the advantage of classroom instruction, but I think it would be helpful even for self-study.
+1 to this, I think Ramit Sethi's material is a great introduction to financial knowledge. This year I'm following up with Bogleheads and, if I can handle it, The Intelligent Investor
