I aslso have a 14 MB Windows shell utility that lets me quickly send one or multiple documents to my Kindle device or library. I can access the docs on my Kindle or just toggle the information to remain in my personal Kindle library for safe keeping. This is an important facility because one of my daughters shares my Kindle log-in and she can see draft documents that I'm producing for Kindle and Blurb book distribution.
Save-to-Kindle also adds a virtual printer to Windows so I can click "Print" and then "Send to Kindle" in any application. This means I can automatically generate a PDF and send to my Kindle library any web page or file I'm examining. This has helped improve my work flow.