When would this be useful? If your site has a blog with public commenting turned on, links within those comments could pass your reputation to pages that you may not be comfortable vouching for. Blog comment areas on pages are highly susceptible to comment spam. Nofollowing these user-added links ensures that you're not giving your page's hard-earned reputation to a spammy site.

Provide full functionality on all devices. Mobile users expect the same functionality - such as commenting and check-out - and content on mobile as well as on all other devices that your website supports. In addition to textual content, make sure that all important images and videos are embedded and accessible on mobile devices. For search engines, provide all structured data and other metadata - such as titles, descriptions, link-elements, and other meta-tags - on all versions of the pages.

An SEO technique is considered white hat if it conforms to the search engines' guidelines and involves no deception. As the search engine guidelines[18][19][52] are not written as a series of rules or commandments, this is an important distinction to note. White hat SEO is not just about following guidelines but is about ensuring that the content a search engine indexes and subsequently ranks is the same content a user will see. White hat advice is generally summed up as creating content for users, not for search engines, and then making that content easily accessible to the online "spider" algorithms, rather than attempting to trick the algorithm from its intended purpose. White hat SEO is in many ways similar to web development that promotes accessibility,[53] although the two are not identical.
Regarding internal linking, i believe that in the case of two links pointing to an internal page, being one of those links in the group i mentioned above, they will considered only the one witch feed the algorithm with more information. In sites that have the menu before the content, it will be the second link. I think that’s the smart way for them to analyse all the links to better understand the destination page content. And they are smart 😉 .

Thanks for bringing up this point - I agree Eric - competitive positioning can help you determine value that you bring to the table that your competitors dont.  I'm all for it.  Neilsen does some reports that provide awareness, likelihood to recommend, sentiment and other insightsfor your site/brand and your competitors. You can also pull some of that type of insight out of social listening platforms like NetBase, SM2, Radian6, Dow Jones, Nielsen, and so many others.  I've even done some hacked compeitove sentiment comprisons before using Search: searching for [brand or feature] + "like", "love", hate", "wish" etc. 
Black hat SEO attempts to improve rankings in ways that are disapproved of by the search engines, or involve deception. One black hat technique uses hidden text, either as text colored similar to the background, in an invisible div, or positioned off screen. Another method gives a different page depending on whether the page is being requested by a human visitor or a search engine, a technique known as cloaking. Another category sometimes used is grey hat SEO. This is in between black hat and white hat approaches, where the methods employed avoid the site being penalized but do not act in producing the best content for users. Grey hat SEO is entirely focused on improving search engine rankings.

Well, the age of print media is coming to a close. But there’s no reason why some enterprising blogger couldn’t use the same tactic to get new subscribers. Let’s say you have a lifestyle blog targetting people in San Francisco. You could promote the giveaway through local media, posters, and many other tactics (we’ll get into these methods shortly).

Hi, my name is Dimitrios and I am responsible for Crave Culinaire’s digital marketing. I would like to drive more traffic to Crave’s blog. Since Crave Culinaire is the only catering company who provides molecular cuisine, I thought about craving a blog post about that. The influencers in this niche have great success in utilizing recipes on their blogs. I will share some recipes of Brian Roland, owner and head chef of Crave Culinaire.
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On a dating niche site I took the ‘ego-bait’ post one step further and had sexy girls perform a dance and strip to revel the names of the major bloggers in my niche written on their bodies. As you can imagine it got a lot of attention from the big players in my niche and my audience and is a little more creative for getting links, shares and traffic.
Take the 10 pillar topics you came up with in Step 1 and create a web page for each one that outlines the topic at a high level -- using the long-tail keywords you came up with for each cluster in Step 2. A pillar page on SEO, for example, can describe SEO in brief sections that introduce keyword research, image optimization, SEO strategy, and other subtopics as they are identified. Think of each pillar page as a table of contents, where you're briefing your readers on subtopics you'll elaborate on in blog posts.
Tip: Along with delicious I search on scoop.it for similar opportunities. If they liked an article related to a year.. say 2013 and you update the resource to 2014 chances are they’ll share it. Kind of a twist on your delicious + sky scraper technique. You don’t even have to make the content much different or better, just updated! Got some fantastic links recently because of it.
In this excellent post, SEO and Digital Trends in 2017, Gianluca Fiorelli writes, "In a mobile-only world, the relevance of local search is even higher. This seems to be the strategic reason both for an update like Possum and all the tests we see in local, and also of the acquisition of a company like Urban Engines, whose purpose is to analyze the "Internet of Moving Things."

Fortunately, Google puts more weight on the anchor text of external links anyway. So as long as some of your external links have your target anchors, you’re probably OK with a “Home” button. In fact, I’ve ranked homepages with a “Home” anchor text nav button for some seriously competitive terms. So it’s not a make-or-break ranking signal by any means.
Hi Brian, Awsome content as ever! I’m very interested in your idea of creating an ‘uber’ resource list or expert roundup post i.e. linking out to lots of to other authorities in my niche within one post. But should you always create ‘no-follow’ links to these authority sites to prevent juice from passing to them? And similarly if you sprinkle a few outbound authority links in other posts should they all be ‘no-follow’ or do you think big G ignores ‘no follow’ these days?
While most search engine companies try to keep their processes a secret, their criteria for high spots on SERPs isn't a complete mystery. Search engines are successful only if they provide a user links to the best Web sites related to the user's search terms. If your site is the best skydiving resource on the Web, it benefits search engines to list the site high up on their SERPs. You just have to find a way to show search engines that your site belongs at the top of the heap. That's where search engine optimization (SEO) comes in -- it's a collection of techniques a webmaster can use to improve his or her site's SERP position.