Which of the cache options should you use? I prefer Never because it makes my Web sessions much quicker. Whenever I tell a browser to go to a Web page that's already in the cache, it loads the page from the hard disk right away, without sending a verification message to the server first. Even if the browser doesn't have to retrieve the page again because the page hasn't changed, checking with the Web server can slow you down noticeably.
On the other hand, I have to remember to keep using the Reload command to be sure I'm viewing the latest version of the Web page. Some people might prefer to use the Once Per Session option to ensure that they are looking at a recent page.