How to expand your "product line"

© iStockphoto.com/Patryk Kosmider

You know how every new movie seems to spin off a dozen related products? Writers can do the same, Joanna Penn writes on The Book Designer. Penn offers some pointers on creating video, audio, and other multimedia products: "You can use video interviews with experts in your niche for blog content but also for your products," she writes. "You can use Skype for free video calling and then Ecamm for the Mac and Pamela for the PC in order to record in the split screen mode."