When you have a word file over 3Mb, it might help to reduce the size of the photos. The problem is often that you use a resolution too high for the print quality.
Let's double click on one of the picture you inserted in your word document, chose [compress] and click on [all pictures in document]. You can now change the resolution to a print quality. This can reduce your file size to a half or a third if you have inserted very big photos from a 7Mb digicam fro example.
Here is a screenshot from the action:
Enjoy the small file size!