Web traffic is the only thing that really matters in internet marketing as location is to real estate so is traffic to website. If you cannot generate targeted visitors to your site, you will not make any sales.

The major tool use in generating web traffic to website is the search engine. Though advertisement can also be used, but it comes with cost. Using the search engines to generate targeted (interested in your product) web traffic is the least expensive method known.
Many website owners do not understand the importance of search engine visibility, thereby placing more importance on producing a "pretty" website. Not that this is bad, but it is really secondary to search engine placement.

Absence of XML Sitemap/Robot Text File
Most site owners often neglect either or both of the above mention files, both serve as powerful document often use by search engine/bot(not all) in getting information relating to your site.

Choice of Keywords
For each post, it is important to choose the right keywords and potential customers will find your site. Use the wrong ones and your post will see little, if any, web traffic.
Make sure your Keywords centralize on the theme of the post and mostly used in the post.

Using keywords that are not related to Website /Post
Unethical website owners/designer try to gain search engine visibility by using keywords that have nothing at all to do with their website. They place unrelated keywords in a page (such as "sex", the name of a known celebrity, the hot search topic of the day, etc.) inside a meta tag for a page. This technique is considered spam by the search engines and may cause the page (or sometimes the whole site) to be removed from the search engine listing.

Read full text here : http://www.cashnetk.com/xpeceg

Nice write up... you've successfully pin point all the necessary things to boost web traffic.

submit your site to Facebook free basics you will get unlimited traffic . wait for the review .
https://developers.facebook.com/docs/internet-org/gettingstarted

There's more to SEO than these

Meta tags
Image optimization title and alt tag
H1 & H2 tags
Keyword research
On page SEO
Keyword density

They are much...

amosbz:
Web traffic is the only thing that really matters in internet marketing as location is to real estate so is traffic to website. If you cannot generate targeted visitors to your site, you will not make any sales.

The major tool use in generating web traffic to website is the search engine. Though advertisement can also be used, but it comes with cost. Using the search engines to generate targeted (interested in your product) web traffic is the least expensive method known.
Many website owners do not understand the importance of search engine visibility, thereby placing more importance on producing a "pretty" website. Not that this is bad, but it is really secondary to search engine placement.

Absence of XML Sitemap/Robot Text File
Most site owners often neglect either or both of the above mention files, both serve as powerful document often use by search engine/bot(not all) in getting information relating to your site.

Choice of Keywords
For each post, it is important to choose the right keywords and potential customers will find your site. Use the wrong ones and your post will see little, if any, web traffic.
Make sure your Keywords centralize on the theme of the post and mostly used in the post.

Using keywords that are not related to Website /Post
Unethical website owners/designer try to gain search engine visibility by using keywords that have nothing at all to do with their website. They place unrelated keywords in a page (such as "sex", the name of a known celebrity, the hot search topic of the day, etc.) inside a meta tag for a page. This technique is considered spam by the search engines and may cause the page (or sometimes the whole site) to be removed from the search engine listing.

Read full text here : http://www.cashnetk.com/xpeceg

These things you pointed out are good to watch out for but they're just the basic SEO stuff, plus if you're on Wordpress...some SEO plugins like Yoast will automatically take care of things like XML Sitemap. So you don't need to worry over it.

From experience, the strongest factor that increases search traffic is the quality, quantity and relevancy of external links pointing to your individual webpages.

The more credible and authoritative links you can get to your blog, the more Google believes your content are super useful and that people loves it and find it more useful than others.

This is why you see smart marketers engaging more in content marketing, guest blogging and all sort of link building tactics.

My take...

I think it be nice to share some precise approach with SEO strategy.
Please find time to read search engine optimization strategies and also onpage optimization (which to me has more relevancy than off-site, off-site is now being measured naturally because if you have a very good social sites account and a very powerful content worth sharing, it will easily catch as a wild fire spread round the internet and gives Google no excuse to place your site on SERP, but then you might need to understand how to better optimize your webpages for this, and that is why I am providing you another post on it (over detailed) what is onpage optimization
Hope you find it useful, there are other content on the blog like how to do keyword research, how to rank on google etc so you can understand an dlearn more on SEO and other online marketing strategies for freee.