Thanks for sharing this! The tip about not using your brain as a task manager really hits home. I used to keep 'open tabs' in my head for edge cases, Slack messages, and upcoming code reviews, and I'd end the day exhausted without having written much code. Moving everything to a low-friction external system (like a markdown file or simple todo list) and leaving 'breadcrumbs' before stepping away for lunch has completely transformed my focus and lowered my re-entry cost.