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There you go Adam, Ryan got it in one! : )

There's the Technorati Top 100 blogs, which is ranked according to Technorati authority, which must be reasonably close, some incredibly high domain authority sites on there.

You can check it out here: http://technorati.com/blogs/top100/

But if you're looking for sites ranked specifically by SEOMoz Domain Authority then I don't think so, at least not that I'm aware of : )

Hi there,

We always recommend our clients place their blog on a sub-folder, rather than sub-domain - so practo.com/blog rather than blog.practo.com. This way any links gained to your blog posts pass more power to your domain.

In terms of the URL it's up to you whether or not to include the category, but we generally don't on ours and client blogs. Practo.com/blog/article-name would be a good way to go (assuming you're talking about blog posts). If you're using Wordpress, change your permalink structure to %postname% and that will do it for you. To do that write a new post and hit 'edit' next to the URL under the title in Wordpress, then select 'custom permalinks' and enter it in there. I'd also recommend installing the Yoast Wordpress SEO plugin, which will really help you nail down the SEO elements of your blog posts and attack long-tail keyphrases.

For tracking and comparing month on month / year on year Google Analytics is excellent (and free).

For getting your content indexed, make sure you have a sitemap (a segmented XML sitemap will work well) and submit to GWT. Try and build some links to your content - or better yet, produce good content and promote it via social media and the links will come naturally, which will help with indexation. You could also consider submitting your site to Google News if the content is good enough and your site meets their requirements.

Hope that helps! : )

You don't need a 301 redirect for this - unless you've got some really strong links pointed to it. If it's search you're worried about, just do as Mark suggests above and remove the page from your sitemap. If you have a link to that page that's actually sending traffic, then you could 301 it to the most relevant page that does exist.

It's worth putting in the effort to create a customised 404 page with some links to other content, that way if people do end up on your 404 page you've got a much better chance of keeping them on the site.