Knowing if you're using a specific editor (like VS Code or Vim) or a custom app will help me give you a more specific implementation.
Even with a .txt extension, you can maintain Org-mode's powerful structure:
: Apps like Beorg (iOS) or Orgzly (Android) can often be configured to recognize .txt files as Org files, allowing you to manage tasks with a mobile-friendly UI. 2. Automated Formatting (The "Markup" Feature)