I have a really strong/authoritative blog on the whole blogging niche (make money blogging). Should I add a directory to this? The main domain is a PR5 I am so not sure about this. Any input is appreciated.
If you are already doing well with your blog, a directory is not a good idea... Creating another blogs with different niches under subdomain would benefit a lot... there is no money in directories... kind of saturated business...
Adding more blogs is not a good idea theres a unique profile for the blog itself. Adding other niches to a subdomain would completely screw it up. Directory seemed like a kind of a good idea there but I guess not. A forum would be way to hard to build up, but hows that though?
I would leave you blog alone, and try try marketing a new domain separate from your PR 5. The last thing you want to do if effect your current traffic or usability.