The Amazon Kindle does a great job displaying eBooks. You can also use it to send Microsoft Office documents and PDFs to your Kindle for easy reading too. Here’s how.
First download Send to Kindle on your windows computer.

Installation is a one click process. Launch the Sent to Kindle executable file and click Install.

Next register you kindle by entering in your Amazon account credentials.

Send to Kindle is actually a shell extension for Windows. To send a document to your Kindle right click on it and select Send to Kindle from the context menu.

The Send to Kindle screen comes up. Enter in the Title and Author fields, select to deliver over WiFi or Whispernet. Sending it via WiFi is free.
Then select the device(s) you want to send the document to. Here I’m sending the PDF to my Kindle Touch and Kindle Fire. You can send your documents to any Amazon Kindle or iPad, iPhone or iPod touch that has the Kindle software installed.

A progress screen is displayed while your document is uploaded.

After the upload is complete, the following message appears. The Amazon software will format the document so it displays well on your Kindle.

Make sure your Kindle is connected to your WiFi network. After a few minutes you’ll see the document is being delivered to your Kindle. Here the PDF is being sent to my Kindle Touch.

When it’s complete, your document will display on your reading list.

Another way to get your Office documents delivered to your Kindle is use the Print To option. While in a document, click the option to print. For Printer Name select Send to Kindle from the dropdown menu. Click Print.

Then go through the same steps to send the document to you Kindle shown above.

One problem I had was with PDFs, some of them didn’t render correctly on the Kindle Touch. The text was too small. If I enlarged it, the document wouldn’t fit on the page. I found it best to read on the Kindle Fire in Landscape View.
This works with Microsoft Word, Notepad and PDFs and Pictures. It does not work with Excel or PowerPoint documents.

You mentioned this will work with Kindle software on iPad, iPhone, iPod, etc. How about the same for Android? I use Kindle software on my Samsung G S2, and various computers. Can’t this work to simply upload to amazon cloud to be accessed by any device that has Kindle software?
yes it works for Android devices that are running the Kindle app.
What if there are 3 Kindle devices on the wi-fi network? Both my wife and I have Kindle Fires, and she also has a Kindle reader. How do we indicate which device is the proper recipient? Thanks.
Paul, check the last screen shot on this page. In the “Deliver To:” dialog box you can select where you want to send it.