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Hi Peter, I manage a site called www.theremovalistsguide.com.au and l'm always looking for webmasters in the industry to work with. Please feel free to contact me on rob@theremovalistsguide.com.au I'll look forward to hearing from you.

just because it may or maynot help with search rankigns doesn't mean those links and comments won't drive traffic. if you add a valuable comment to the blog then people are likely to click through from that site to your own, its not just about rankings

Yes definitely get people interacting with your blog. This will get them to share it and ideally build you backlinks organically. Since your blog is (hopefully) tied to your domain, this will only work to improve your SEO efforts! The best way to do this is via social media. Facebook, Twitter, Google Plus -- develop a presence on there. Find groups and communities that match your niche and get them to remember you and be interested in your postings. It's all about content! Once you have interesting content, promoting it becomes easy. If you can comment on other people's blogs and have a relevant blog to link back to you will definitely gain readers. Keep in mind those links will most likely be nofollowed so don't just throw a link out there to get a link. Put it out there only if you truly think it adds to the conversation and people will naturally follow it and hopefully link to it themselves. Good luck!

I agree with Mike. Stay away from automated tools if possible. One of the major social bookmarking sites is StumbleUpon, I believe you can also promote pages on The Youth International Pakistani Newspaper site as well. Just like every other social site, you will want to be somewhat active and contribute in order to get the best value.

I find Domain Authority to typically be a much stronger candidate for results.  Installing the "mozbar" to your browser and using it (make sure you are logged into Moz) will really help show you what I am speaking of.  Many times, websites like Yelp will list on the first page for a business with a page that has a Page Authority of 1, but the DA of the site is so strong that it outranks other pages with a much higher PA. The way I see it, PA will help get a certain page to rank, but DA will get all your pages to rank (which will help diversify your SEO thus bringing way more traffic to your site for different sets of keywords.)  Remember, each page should be for a different topic, so if your front page is for your main target keyword strand, and you have a high PA but a low DA, your site is likely to rank for that one term, but all the interior pages wont.  Whereas, if you have a higher DA, you can rank higher for every page on your site with different keywords.  The best way to do this is to link multiple pages from your site.  For instance if you are guest blogging, don't just include a link to your front page.  Try to include a few links to interior pages as well for relative topics.  Also, I have actually seen Google Adwords give stronger DA.  I know many will argue this, but when campaigning on adwords, you can send different keywords to different pages.  Users entering your site through interior pages is a good thing, as Google seeing everyone come to your site from the front page can sometimes lower your DA. Hope this helped!