James Clear's 3-2-1 (Recommended)
I read Atomic Habits on the recommendation of (seemingly) all the self-improver readers I know. It's a great book, short and readable, full of sound wisdom packaged in a digestible way.
After reading the book I signed up for his newsletter. It's a weekly nugget of goodness. I am always happy to have read it. I can't say what area of life or work it helps with because it spans domains. You just have to read it to know whether you'd like it. Here is today's: https://jamesclear.com/3-2-1/july-20-2023
~Shannon, The Optimistic Optimzer