Salary.sg Forums - Quick question about branding

Hello,

I have a my own website where I promote web design services (primarily) but am getting into helping online entrepreneurs (designers, consultants, etc..) with internet marketing. I am creating a product to help them learn how to build a list for their business (not a "I'll show you how to get 1000 subscribers in 7 days on autopilot" kind of product). I actually went through many resources and even checked Brand Marketing Examples for help but did not find any help.

Here's my question...should I get a separate domain for my product or set up a sales page within my website for branding purposes?

Any help will be appreciated.
Thank you.