Personal development CDs offer home workshops with experts that you can listen to, follow and engage with from the comfort of your own home. They teach techniques that you can learn, new skills to master and bring you insightful words of wisdom from spiritual leaders.
Some personal development CDs teach self-healing methods that you can use and apply to certain areas of your life. They're like personal development books, but read and explained by the author, as if they were having a personal conversation with you. In many ways, they are just as effective as if you were to attend a workshop in person – but you might gain more from the CD as you can play it over and over again so the information really sinks in and you remember it.