On the other hand, I'd like to know how many people constitutes your new experience as an indipedent consultant? Infact, as others noted in the comments here, what you suggest is perfect especially for an in-house SEO situation or in for an Web Marketing Agency with at least 5/8 people working in. Even if all you say is correct and hopefully what everybodies should do, I honestly find quite difficult to dedicate all the amount of time and dedication in order to check all the steps described in your post. Or, at least, I cannot imagine myself doing it for all the clients.
For some reason I had to delete some pages, these pages are using the HTML suffix, so I blocked them in robots.txt use Disallow: /*.html, but it’s been almost a year, I found that google robot often capture these pages, How can I quickly let Google completely remove these pages? And I have removed these URL from google webmaster tool by google index-> remove URLs, but Google still capture these pages.
Google Analytics is an invaluable source of data on just about every conceivable aspect of your site, from your most popular pages to visitor demographics. Keep a close eye on your Analytics data, and use this information to inform your promotional and content strategies. Pay attention to what posts and pages are proving the most popular. Inspect visitor data to see how, where and when your site traffic is coming from.
If you are using Responsive Web Design, use meta name="viewport" tag to tell the browser how to adjust the content. If you use Dynamic Serving, use the Vary HTTP header to signal your changes depending on the user-agent. If you are using separate URLs, signal the relationship between two URLs by tag with rel="canonical" and rel="alternate" elements.
Google has recently changed how you can use the Google Keyword Planner. Before, everyone who signed up could see the search volume for keywords. Now, it only shows estimates. There is a way to get around this. You need to create a Google Adwords campaign. The amount you spend doesn’t matter. After you do that, you will regain access to the search volume.
Website owners recognized the value of a high ranking and visibility in search engine results, creating an opportunity for both white hat and black hat SEO practitioners. According to industry analyst Danny Sullivan, the phrase "search engine optimization" probably came into use in 1997. Sullivan credits Bruce Clay as one of the first people to popularize the term. On May 2, 2007, Jason Gambert attempted to trademark the term SEO by convincing the Trademark Office in Arizona that SEO is a "process" involving manipulation of keywords and not a "marketing service."