Site Optimization or site performance is a must point for any website . No user want to surf a site having a bad load time but you know this optimization also enhances your SEO too (http://webkul.com/joomla-tutorial/memcached-in-joomla) . There are some aspects which are the key points for better search engine optimization

1 - Attach a Blog to your site

2 - Page Title and meta data (but make sure page title and meta data have a range of 70 and 150 characters )

3 - Headings are also an important concept

4 - It is important to note that search engine crawlers cannot really "see" images. So, if you have lots of images that contain textual content within the image itself, this content will not be seen by the crawlers.

5 - Inbound Links

6 - Del.icio.us Entry

7 - RSS Feeds

8 - Tweets of your site

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