Before submit to search engines check your website URL

[alvinbert]

Your website should be finished without errors:

have a good design
have a site map
no html tag mistakes
no broken links
no spelling mistakes

[tah123]

I agree with your all points.I would like to add that pay attention on content.Content of your site must be unique and fresh and also create robot.txt.

[teagan05]

Another main thing to do is changing the content of your site periodically to crawl your site more by the search engines.

There should not be any cut copy paste from any sites.

[motorola4gatrix]

I never submit to search engines and regardless of whether you do or not it's only common sense that they should have what you listed....

[kellyfoote]

Yup agree with all your points.