The article says, “…e-books can be a terrific way to gain attention. If you can produce something that’s actually worth reading, and your readers find it useful — and share it via e-mail and Twitter — then you’ve got a chance to forge a genuine connection with the reader.” In this case, your goal is not to make money on these downloadable publications. It’s to get recognition.
The article then goes on to give some tips, like:
As for converting your document to a PDF, you can do that with a free trial from Adobe (createpdf.adobe.com).Another tip they mention and I would emphasize is editing. Even though you’re giving away content for free, it must be the best it can be. It represents you and your writing. Putting unedited or poorly edited material out, even if it is free, won’t draw people in to buy your books.