You may also be interested in:

Up-to-date Content

Keep your site very content rich. Have a lot of pages.Update the site even twice a day if you have the time. Content is a golden word in Search Engine Optimization. If your content is Original then its a big plus. High ranking websites in google,yahoo and msn have a plethora of content.You can gain much on a poorly updated site.

Clean URLs

Clean Search Engine Friendly URLs have always been known to help. urls like domain.com/articles.php?id=344 are not bad. But domain.com/articles/name-of-article/344.html is a great option.

Never link to illegal sites

Linking to sites that are not doing lawfull stuff may get your site blacklisted.Stay away from such sites even though you might loose some bucks.(Link Building Tech)

No Spam and No Duplicates

Updating your site does not mean that you copy paste content from other sites.That will only push your rankings further down. Don’t have any duplicate content. At the same time ,dont spam multiple content across the same website.

Reliable Web Host

Get a web hosting which has more than 99.5% uptime. Its a total waste if you have a fantastic website but its not online

No cloaking text/keyword stuffing

Never ever try to hide text in a webpage to a user, and show it to search engines.Search Engines are smart these days and are not text only anymore. They even give importanct to the graphical information on the site.

Have the Web User in Mind

Build your website having the general layman who spends time on your website in mind. Having a site with good accessibility always has a good future.

No to excessive out bound links

Dont have too many links on a single page. Instead split your content into sections/categories. Too many outbound links are not good for SE rankings as well as visitors. It may look like a link farm or directory.

No spyware / adware

Never make your site a home for spyware and adware. Try to keep your site clean and easy to use.

seo, up-to-date content, Web Host, web users