How can I check file paths and existence within my application before attempting a 'copyfile' operation to prevent 'ENOENT' errors?

Use the `fs.existsSync()` or `fs.stat()` (checking for existence and permissions) methods from the Node.js `fs` module. Always check that source file exists and that you have necessary permissions to read it and that you have write permission to the destination if the destination doesn't exist. Using these methods before the copy file operation will give you time to create directories or to take other corrective actions.