One of my favorite books that I reread at least once a year is Reminiscences of a Stock Operator. The book is a compilation of the learnings of famed speculator Jesse Livermore who managed to build and destroy multiple fortunes. Despite the book being nearly a century old, it contains multiple lessons that remain applicable today.
The one that really resonates is the importance of patience. Livermore talked about how his worst decisions came when he was “eager for action”, and his best trades came after long periods of inaction.