Optimizing account performance in NetSuite before seeking administrative intervention involves steps that can reduce loading times and improve responsiveness. One effective approach is to utilize the "Select Delay Loading of Sublists" feature. This option allows pages within NetSuite to load without immediately loading the data contained in subtabs. By delaying the loading of these sublists, the initial page load time is decreased, making the system feel more responsive to the user. This approach is particularly useful for records or pages with multiple sublists that can significantly contribute to loading delays. Another basic task is to troubleshoot user firewalls and proxies for HTTP connections (D), as these network configurations can affect the performance and accessibility of web-based applications like NetSuite. Performing actions repeatedly (A) and attempting the action with multiple users to identify user-specific errors (B) are less about optimizing performance and more about diagnosing issues, thus are not primarily recommended for performance optimization.References: NetSuite's documentation on user interface preferences and performance optimization techniques.