If you are looking to create residual income, you may want to look into creating and selling your own information products. This will allow you to do the work once, and then continue to profit from it by selling it over and over again.
An info production can come in the form of an ebook, a special report, an Mp3 recording of yourself reading an ebook, a recording of an interview between yourself and an expert, a recording of a teleseminar or webinar, the transcription of a teleseminar, or any other form of information. These can also be combined together to form a larger packet of info.
One of the main reasons people come to the internet is find information. Instead of sitting around and wading through and endless amount of web pages, trying to find what they are looking for, many people will simply pay for an information product that will teach them what they would like to know.