Here is another good tip to increase your browser's performance.
Turn Off Show Images: Downloading images takes a lot of bandwidth and slows down your BlackBerry when loading them.
From the Browser Options --> "Browser Configuration" screen set "Show Images" = no, and uncheck "Use Background Images".
Note: You can easily download the images for any page by pressing "M" for more images, or "Q" for all images. These options are also available from the menu.