The Help file and the Bookmark area in the Favorites tab both document how you can set a bookmark using Ctrl+Shift+1...9, but once you've set the bookmark, the keyboard help hint disappears from the Favorites tab, so new users who haven't come over from 3.0 (where it is well documented) will not know that you can simply type Ctrl+1...9 to jump to the bookmark once you've set it. The way the UI and help files look, you'd have to keep your Favorites tab open and click on the bookmark to go to it. What a pain that would be! Fortunately, it's not so. But please fix the UI and the Help to educate people better about this.
UPDATE: I've added it to the list of keyboard shortcuts on the wiki (but that list was originally taken directly from Help; and I have no way to add it into the Help file)