Every web browser has a toolbar you can enable that gives you quick access to your most frequently used bookmarks. What this toolbar is called depends on your browser:
Internet Explorer: Favorites bar
Google Chrome: Bookmarks bar
Mozilla Firefox: Bookmarks Toolbar
This toolbar normally shows up right under the address bar. Instead of placing bookmarks directly on the toolbar, you can add folders to the bar and then add your bookmarks to the folders. This gives you nice drop-down menus for quick, organized access to your most frequently visited sites.