Ok the first thing I always check is server headers, a common mistake is 302ing the home page to an internal page so here is the screen shot of what a server header should look like :
the next thing is Links and ratio of inbound to outbound links something like :
I can see that I have too many internal links, I still like the 100 links on a page rule, so that means I need to do some culling, most probably in my NAV .. any way externals links is next on my list. What is the web master allowing to be followed is normally a good indication if a site is selling links, if a high % of outbounds are a Nofollow and a few and clean links, IMO the clean links are either owned by the web master or are purchased .. Blog’s can be a little different you can see mine here :
I can also see that I have a few Sphinn links due to the fact that I pull in their RSS, but again I’m happy that Danny and his Mods will keep that feed clean but it’s a good reminder that I’m linking externally !!