If people are posting questions about glazing there is definitely an opportunity here.  You could start blogging great answers to common questions so and then set up alerts for when those questions appear.  When they do you can post a short answer to the question but provide a link to the indepth version.

This also means you start improving the quality / depth of content on your site at the same time, which has to be a good thing.

If you have a picture of the link profile you are trying to build (usually based on competitor analysis) then that helps guide you.

However my one guiding principal has always been to try not to be overly reliant on too few tactics.  That probably means I've missed out on some easy wins over the years. However it also means that I have sites that have been sitting at the top of their industry results for over a decade, never leaving page 1.

Mix it up. Find something that works - then find something else. No reason why articles can't be part of that, but if you are producing that content anyway then why not put some aside for guest posting? If you are researching guest posting opportunities why not see what else those sites are looking for?

Really hard to say without knowing the site.  However my first place to look would be at technical issues. Are they crawl-able and indexable?

• Check robots text, metatags etc - are you allowing googlebot to crawl?
• Log in to webmaster tools and see if any URLs are being blocked/unreachable
• Point a crawler, such as Xenu or screaming frog at the home page. WIth all settings set to mimic Google, does it find the posts?

If it passes all of those it should be technically indexable.  If that doesn't turn up anything I would start looking at when Google is crawling the site (webmaster tools) and see if that is the problem.

diigo is a bookmarking service.  I use it myself, largely to save things I find online for later reading in a cross platform manner: ie I spot something on my phone and diigo it for later reading on my laptop.

diigo has a few features that similar services don't offer, which I why I switched from evernote.  Groups sharing is a win for me as are some of the annotation features.

You can make your bookmarks public as well, which is where those backlinks you are seeing probably come from.  Are they all from a couple of users or seem to be quite widespread?

Social bookmarking as a link building means is pretty old hat to be honest and generally not too effective. In fact too high a proportion of this could be risky.  I think that most people would rather have one nice authority link than a load of diigo links.

Short version then: good service, but not for link building.

I've only looked at a handful of pages / categories, but I am not sure that you are doing yourself too many favours.

In SEO terms I think that you are undermining your unique content pages.  By repeating the unique content from the product pages on to the category pages you are effectively introducing duplicates.  Yes, it is your own content, but spreading it across those pages is unlikely to do you many favours.

More importantly it's also pretty confusing in places.  Some of those categories are quite off putting.

What would I do?

1. Remove those descriptions from the cat pages
2. Add category descriptions
3. Try to flesh out the product descriptions with more unique content and keep an eye out for those that duplicate each other.

I hope that helps.

If you are talking about link that you published to other people's websites, you are stuck with short URL services I am afraid.

The shortener services track the use of your link by redirecting them through a script that monitors traffic.  That is what you get reported back.  If the links are direct then you don't get that  tracked, so no data to report.

You could work around that by setting up your own redirect script.  You'd then post your own URLs and get them to redirect, picking up the data on the way.  Quite easy to write, but I am sure that someone will have already written this and made it available somewhere online.

If the links are to your own pages anyway then you can use analytics to monitor their use.  Using campaign tracking variables on the link will let you track particular posts.

Other than that you are stuck with the metrics provided by the places that you post the links.  Those are not that helpful I know.

What is the particular problem with the likes of bitly?  What are they not given you that you need?

Unless you can genuinely and legitimately justify unique content for each I would either canonical them from the start or better still get them on one page.

I know it sounds like an easy long-tail win, but it can go horribly wrong.  I'm currently working on a site that is being heavily penalised as a result of a similar approach and we're having a nightmare getting the thin content out of the index.