To stay updated with JavaScript best practices and new features, you should: 1) Follow the official ECMAScript (ES) specification for the latest language updates, 2) Regularly check resources like MDN Web Docs and JavaScript.info, 3) Subscribe to newsletters like JavaScript Weekly, 4) Listen to podcasts such as Syntax and JavaScript Jabber, 5) Join JavaScript communities on Reddit, Stack Overflow, or social media, and 6) Attend webinars, meetups, and conferences related to JavaScript and web development.