Relationships are the new currency. And if you want to turn followers into fans, and fans into paying customers, then you need to create relationships with people: let them get to know you. Selling fire alarms is a great idea, but you need to give people time to trust you. By creating a podcast, you are able to get yourself out in front of people and be real with them. As they listen to you, they will get to know you and like you, so when it comes time for them to buy your product, they will feel good about the decision. On your podcast, you can talk about all sorts of issues related to fire alarms, such as the different types available, where to buy them, statistics surrounding their effectiveness, and the cost involved not only in purchasing them, but also in having them installed in your home. Try to make it interesting, and you may have a following before you know it!