As a ReactJS developer, here are some advice to consider:

• Keep up to date with the latest trends and updates in the React ecosystem. Attend meetups, conferences, and read the latest blogs and articles.

• Focus on creating reusable components that can be used across different projects. This will save you time and make you more efficient as a developer.

• Understand the principles of Redux and the importance of state management. Redux helps to manage the state of your application, making it easier to debug and maintain.

• Learn to write clean and readable code. This will make it easier for other developers to understand and maintain your code.

• Practice good debugging techniques. Use tools like React Developer Tools and Chrome DevTools to debug your code.

• Use best practices in your development process, such as code reviews, automated testing, and continuous integration and delivery.

• Don't be afraid to ask for help or advice from other developers. Join online communities like Stack Overflow, Reddit, and GitHub to learn from others and share your knowledge.

• Keep an eye on performance. Optimize your code for better performance, as slow performance can be a major issue for React applications.

• Finally, be patient and persistent in your learning journey. React is a complex and constantly evolving technology, and it takes time to become a proficient developer.