20 Useful Node.js tips to improve your Node.js development skills:

1. Use NPM Scripts: Leverage NPM scripts for automation, such as running tests, bundling, and starting your Node.js applications.
2. Package.json Scripts: Organize your scripts in the package.json file for easy execution, and use descriptive script names.
3. Asynchronous Code: Embrace asynchronous programming using Promises, async/await, or callback functions to handle non-blocking I/O operations.
4. Error Handling: Always handle errors gracefully with try-catch blocks, error middleware, or event listeners, and consider using error monitoring tools.
5. Use ES6+: Take advantage of ES6+ features like arrow functions, template literals, and destructuring for cleaner code.
6. Environment Variables: Store sensitive data and configuration settings using environment variables for security and flexibility.
7. Leverage Middleware: Use middleware in your Express.js applications to handle common tasks like authentication, logging, and request parsing.
8. Monitoring and Logging: Implement logging and monitoring with tools like Winston, Morgan, and Sentry to track application behavior and errors.
9. Nodemon: Use Nodemon for automatic server restarts during development, making it easier to test changes.
10. Security Practices: Follow best security practices, like input validation, avoiding eval(), and using libraries for authentication and authorization.
11. Destructuring: Simplify object and array manipulation by using destructuring assignments.
12. Promisify Callbacks: Convert callback-based functions to Promises using util.promisify for cleaner code and better error handling.
13. Use Event Emitters: Implement custom event emitters to build event-driven architectures and handle asynchronous communication.
14. Keep Dependencies Updated: Regularly update your Node.js packages to fix security vulnerabilities and improve performance.
15. Testing: Write unit tests for your Node.js code using testing libraries like Mocha, Chai, or Jest.
16. Request Validation: Validate and sanitize user input to prevent common security vulnerabilities like SQL injection and XSS attacks.
17. Scalability: Plan for scalability from the beginning, using clustering, load balancing, and microservices when necessary.
18. Debugging: Utilize built-in debugging tools or third-party debuggers like VS Code or node-inspect for efficient debugging.
19. Memory Management: Be mindful of memory consumption; use tools like Node.js's built-in heap snapshots or memory profilers to find memory leaks.
20. Performance Optimization: Optimize your Node.js application by profiling and benchmarking, and consider using performance monitoring tools.

These Node.js tips will help you write more robust, secure, and efficient Node.js applications and improve your development workflow.