Better yet, instead of printing the Word document to a PDF manually, you could check out my little Word add-in which does precisely that for you, including all the necessary adjustments. The result looks great, I use it to convert my school documents with equations and stuff to a Kindle-fit-PDF
Here's the link to my blog where you'll find the download link:
http://blog.chrasty.cz/kindle-sender...-documents-and