A few guidelines to help make the look-and-feel of the content as homogeneous as possible:
If you already have some content created in either MS Word, OpenOffice or HTML format, there are some scripts and/or online converters that are available. You can find them at:
One note about all of them. They will probably create external links to graphics. I’m not sure about the OpenOffice or MS Office ones but the HTML ones did. So you will have to go back and edit them a bit to get them pointed to any graphics you upload locally.