OK I'll bite; :)

0. You found something interesting. Great.
1. Open a new tab in your browser (+ sign to the right).
2. Paste the term archive.org into the search-bar at the top of the page.
3. Go to the open tab that has the content page you can see, and that you want to highlight.
4. Copy that content url. [CTRL C] (Highlight the address at the top of the window)
5. Go to the archive-org tab and paste the url [Cntrl V] into the search-bar pane, next to the letter Q, that says Enter URL or Keywords
6. Hit enter
7. The page will find instances of people having posted the link; or it will invite you to archive the new link
8. Pick up [Cntrl C ] the new link that has been generated
9. Post it here [Cntrl V], in your post, using the chainlink symbol, or as a 'link' attached to your new post.

Thanks.