For starters, I would say Enterprise Content Strategy: A Project Guide is a good choice. Though really, the important take away is to know your target audience.

For starters, I would say Enterprise Content Strategy: A Project Guide is a good choice. Though really, the important take away is to know your target audience. There are a few other gems over on xmlpress.net that are also worth a look. Next, read the sort of things you want to write, then try writing the things you want to write. It's really that simple!