Whats the best search parameters on Open Site Explorer for identifying un-natural back links?

[Stromme]

Using open site explorer, what parameters will best narrow down low quality back links(or back links that could be viewed as un-natural by Google)? ie. blog networks, link schemes, etc.

[kchandler]

Use the anchor text tab with it set on "phrases" and "all pages on this root domain."

Once it loads - look for high volumes of exact anchor text. Specifically terms that are not branded or the websites domain/URL. This is a big identifier of spammy tactics.