For those who are completely new to this: Activate the bookmarks toolbar. Go to archive.is and click-and-drag the bookmarklet to your bookmars toolbar. Any time you open a new page that is relevant, click the bookmarklet and the page will be archived automatically. Save the links to both the original and the archive somewhere (such as a text document labeled with the name of the article/topic).

That is pretty much the simplest, fastest way.