About two years ago, one of my science-fiction clients started a podcast series. Every week he would put a new chapter of his book on audio, and upload it to iTunes and MySpace. He had a tremendous following and I really admired his form of promotion, but I thought it would be too difficult and expensive for me. Wrong! Podcasting is simple and affordable. And it can be an effective way to get the word out about your book because you are offering free content, which people love.
How do you make a podcast? Download free software from Audacity.com or splurge for the user-friendly package by RecordForAll. I went with the latter because it has an easy navigational system, and only costs $39.99. After listening to the tutorial, I was ready to record. I had long pauses in my sentences, but the software gave me the ability to edit. After recording, I took out the blank spaces, and the few times I coughed, or said, "Um" or "Ah." The end result was a polished product.
What can you talk about? Anything related to your book. My new book is called Be Your Own Editor. It's a crash course in grammar basics that deals with the most common errors people make when they're writing, as well as editing issues related to creative writing. So, I made ten different podcasts and broke them down as follows:

1. How to Avoid Writing Run-On Sentences
2. How to Use Apostrophes Properly
3. How to Establish Realistic Dialogue

I made each podcast brief since people have short attention spans online. If you have a nonfiction topic, podcasting is a breeze. Identify key points in your book and abbreviate them. This is a great teaser; it introduces people to you and draws them to your material. You won't be giving your whole book away — just pieces of it to whet a prospective reader's appetite.
Fiction is a little more complicated but you could read your book chapter by chapter on audio. If you choose this method, stop after two or three chapters. That way the reader is left hanging and needs to know the end of the story. Second, you could read excerpts from your book, and talk about yourself and what motivated you to write it. I hosted my podcasts on MySpace and searched the site using the terms writers, poets, editors, etc. Your search words would relate to your book.
You can also load your podcasts on iTunes. This requires software that has a feed such as FeedForAll and a website that will give you more space for hosting like Mevio, which is free.
We've come a long way, baby, since I started writing in my teens. Now that we have blogs, websites, video, web cams and podcasts, why not take advantage of them?

Author's Bio: 

Sigrid Macdonald is a book coach, an editor and the author of three books, including Be Your Own Editor. Visit her at http://sigridmacdonald.blogspot.com or http://beyourowneditor.blogspot.com.