In the near future, the ability to perform the entitled tasks will be simple. But for now, there is only one way to go about this, and it isn't so simple.
Let's pretend that we wanted to add a slideshow to the Blog. We can't do it with the actual page in Pages, but we can perform a trick to make it seem like we can.
NOTE: If you do not know how to perform any of these steps, then this tutorial is not for you.
1) Create a new page and title it something similar to Blog (e.g. Blogs).
2) Save the page.
3) Go to the main Blog on your site as a visitor would and copy the source HTML.
4) Go back to the newly save Blogs page and click on the HTML button on the text editor.
5) Paste the source HTML code.
6) Click Insert.
7) You will notice that the page now looks like a page within a page, meaning the template and everything else from that page is now squished and inserted into the Body of your new page.
We don't want this as this will look ridiculous in terms of formatting, and make it much harder to accomplish our goal.
8) Click on the HTML button on the text editor.
9) Erase the pieces that have to do with the surrounding content of your Blog page.
10) Click Insert again.
11) Now that the template area around the Blog content is gone, we should now be able to add items to this page. I will use the example of a slideshow.
Upload your images to the new page and use the slideshow Ninja code to place the slideshow on the page where you like.
12) Save page.
13) Click on the Gear in the upper-right corner on the black bar and click Redirects.
14) Click Add a new redirect.
15) For the Old URL put in "blog".
16) For the New URL put in "blogs".
17) Click Save redirect.
We are now done. This will allow you to add normal items that any page has to an area like Blog and still keep the rest of the page intact.
DOWNSIDE: If you update your Blog, Products, Events, etc. regularly, you will have to perform the steps above again as the new page will never update itself.