There’s a resource that we refer to from time to time here at Big Splash Web Design & Marketing . It’s Copyblogger Media, which you can find at www.copyblogger.com. Founder Brian Clark and his team at Copyblogger Media are experts in online marketing; specifically, creating quality content that will grow your business online.
Copyblogger offers a tutorial on online marketing called Authority Rules which includes a great report titled The 10 Rock Solid Elements of Effective Online Marketing. This document has some great information on how to leverage your expertise to create more trust and gain more customers.