Writing clean and efficient code is essential to becoming a successful programmer. Follow these 7 rules to ensure your code is easy to read, maintain, and understand. Firstly, avoid creating complexity and write simply. Secondly, strive to write as few lines of code as possible. Thirdly, follow a consistent coding style. Fourthly, always comment your code for better understanding. Fifthly, consider refactoring your code to improve performance. Sixthly, test your code thoroughly before releasing it. Lastly, continuously educate yourself on programming best practices to improve your skills.