Using Fast Dial will allow you to close your links toolbar completely. If you put work-only links in Fast Dial, then your eyes won't be tempted by that Myspace link. Save the links toolbar for after work websites and only view it when your work day is over.
By putting work sites in Fast Dial, your fingers never have to leave the keyboard to skip between all your important websites. If you have multiple email accounts, then throw those in there too. Establishing work-related sites as Fast Dial bookmarks will cut out the usual process of New Tab > URL or bookmark > website, this is especially true for sites where you must hit a log-in page. Just bookmark the log-in page URL in your Fast Dial bookmarks. You will be able to access the page from a new tab or, even better, with a quick keyboard shortcut, which saves a significant amount of your valuable time.
If you use multiple reference sites, put those into Fast Dial. You can set them to open as background tabs with a keyboard shortcut, then open as many as you need behind whatever website you're viewing. Fast Dial allows you quick access to your most used websites while you work, without having to leave multiple tabs open. If you find yourself with 10 open tabs and your pages are begining to load more slowly, then Fast Dial is definitely for you.
Happy workers are more productive workers. Having an add-on like Fast Dial that allows you quick access to important websites and customization options will help keep you happy. I suggest using a background image that makes you smile. That could be a family picture, a picture from a special event, or even just a comic that makes you smile. Every time you open a new tab, you'll see that image and your mood will lighten. This is a great way to give yourself a little lift without straying from your work.