This post was written before several of the new categories, such as the Blog List, Slideshow, or Video or Poll, so that the screenshot below will not quite match what you would currently see. Sorry, someday I'll catch up.
Some people still complain they can't see this item. Sometimes it helps to use Refresh (F5 or Ctrl-F5) or to clear your cache and cookies (in Internet Options-Tools). At times, you might even have to do it twice.
Here is a partial screen shot of the Page Elements list. Others listed below my screen shot are "Logo, Profile, Blog Archive, and Page Header". It is easy to select one and add it.
Click on page-element in the Label box below for other posts on this topic.