QUOTE(vietnamstyle89 @ Apr 16 2012, 07:15 AM)
Here are the following factors you have to consider when your doing On-page optimization.
Title tag, Meta tag, site's content, site architecture, indexed pages, and distribution of targeted keywords.
There is no doubt that the on page factor has a great place to increase your website or value and traffic. I am agreeing with your tips but image alt tag is also an important factor to optimize the on page.