An interesting article by Matthew Inman about his ups and downs in SEO with some techniques that he calls widgetbaiting.

http://www.seomoz.org/blog/widgetbait-gone-wild

The situation we found ourselves in now is that the sandbox has become a normal everyday reality for ranking on Google, and most SEO's now accept that. The result is that to rank on Google for any kind of competitive keyword, you need to be able to leverage some degree of “trust”.

http://www.seomoz.org/blog/how-to-beat-the-google-sandbox

This article is a little dated but it has some great information regarding the process of scoping out the supply & demand of your keyword competition.

http://www.selfseo.com/story-18526.php

Keyword Sniping is one of the most effective forms of internet marketing. What stops people from creating income using this method?

http://courtneytuttle.com/2008/04/01/top-10-keyword-sniping-mistakes/

As one of the most important ranking factors on today’s modern search engines, link popularity starting to gain public exposure, the misinformation about what link popularity is and what it isn’t also starting to grow. Everyday thousand of new webmasters jump head first into their first search engine optimization project after reading a few SEO forum posts or news articles...

http://www.selfseo.com/story-18928.php

I’d like to share a “hack” with you - how you can use Google Analytics to identify your most valuable keyword referrals, and how you can re-optimize your posts to raise your rank and drive more traffic for these keywords.

http://www.problogger.net/archives/2008/03/19/seo-tip-almost-7-ways-to-re-o...

This lesson will cover two important aspects of SEO - PageRank and keyword authority. There are literally hundreds of factors that search engines use to rank pages, so this lesson is not intended to be the ‘be all’ of lessons on SEO. However, these factors are crucial and definitely can not be ignored.

http://courtneytuttle.com/2008/03/18/how-to-increase-pagerank-and-keyword-a...

Link Building... Time-intensive. Frustrating. Sometimes confusing. Yet Unavoidable. Because ultimately, it's still the trump card for higher rankings. Here are 101 Link Building Do's and Dont's

http://www.seobook.com/archives/001792.shtml

It's one of the great things about the web today. While having a massive marketing budget is a significant advantage, if you are smart and fast, success can still be yours. In fact, you can create a brand in all types of novel new ways on the Internet.

http://www.seomoz.org/blog/so-many-ways-to-pursue-links-and-so-little-time

You should be paying very close attention to which keywords are driving traffic to your site. If someone at your company isn’t digging into your keyword referral reports in your analytics tool, you are leaving money on the table. Here’s a list of seven ways to effectively leverage your keyword analytics (for both organic and paid search traffic).

http://www.seo.com/blog/analytics/7-ways-to-use-keyword-analytics-to-your-a...

Link marketing is, like most other activities, an on going process in stead of a temporary campaign. Although it may seem like you should reach a finish line somewhere, your link race track is evolving continuously. Not only do new websites -and thus new linking opportunities- show up, but you also have to keep an eye on your competitors and on the changing needs and habits of your visitors.

http://wiep.net/talk/link-building/when-to-end-your-link-marketing-activiti...

We've recently had several large web properties as clients, and as anyone with a sizable site knows, the volume is all in the tail. Using long tail charts, we can now do things like...

http://www.seomoz.org/blog/the-holy-grail-of-long-tail-information-finally-...

Before investing time and effort in search rankings, and even before setting client expectations, it makes sense to gather whatever intelligence you can about the keywords you'd like to rank for. SEOs and webmasters have few reliable sources of information about the relationship between rankings and traffic. But Wikipedia's traffic stats can help, offering some surprisingly detailed data.

http://searchengineland.com/080312-081353.php

This document represents the collective wisdom of 37 leaders in the world of organic search engine optimization. Together, they have voted on the various factors that are estimated to comprise Google's ranking algorithm (the method by which the search engine orders results). The result is a resource of incredible value - although not every one of the estimated 200+ ranking elements are included.

http://www.seomoz.org/article/search-ranking-factors

Keyword research is one of the cornerstone’s of starting any good search engine optimization campaign. While I use Wordze for all my keyword research, I started my adventures as an SEO with a fair number of freely available keyword research tools. Each of these are slightly different from the other, and when used in combination, they can provide a potent starting point for your SEO campaign.

http://www.searchenginepeople.com/blog/10-best-keyword-research-tools.html

Today I will be sharing a quick practical guide to exploring your competitor’s link building techniques. This research should be both helpful for your overall competitive research and for defining your own first-stage SEO techniques.

http://www.searchenginejournal.com/analyzing-your-competitors-backlinking-s...

Have you ever thought to yourself (or had a client say to you), if I triple my budget, I should see at least triple the results … right? Unfortunately NOT at least in most cases that have anything to do with search!

http://www.searchenginepeople.com/blog/search-economics-the-law-of-diminish...

Avoid tricks, Google says, intended to improve search engine rankings. Of course, they don't mean it, or else we'd all be out of a job. When we explain what we do to people, we tend to use words like 'tactics', 'methods' and 'strategies'. The Search Engine Strategies Conference and Expo is currently taking place in London. Search Engine Tricks wouldn't sound so legitimate, would it?

http://www.seomoz.org/blog/will-search-engines-ever-regulate-your-linkbait

To some, Google Sitelinks are the ultimate endorsement of a website or ‘blog. While there are many clear advantages, knowing how to gain Sitelinks has always been something of a dark art — more guess work than hard work. But what if I said I knew a way?

http://www.blahblahtech.com/2008/02/google-sitelinks-explained.html