1. Using your keyword list as a meta title. Put an adjective in front of your nown. Make "dogs" "Hunting dogs".
2. Not redirecting the www and non-www (root) versions of your site to the same place.
3. Not checking to see how many pages you have indexed in Google, MSN and Yahoo. This is a simple way to test for potential crawling problems.
4. Bad headlines. Make your headline unique and interesting. People scan and rarely read.
5. Think that Joomal work out of the box. You need to install an extra SEF URL component. Do consider something like Joomlatwork's SEF patch. Do use external statistics such as Google Analytics to track your visitors and conversion rates.
6. Wasting your site's link juice with social bookmarking links, technorati tags, RSS Feeds for every component, print and PDF buttons and anything else that is cluttering up your page. Your visitors and search engines do appreciate clean, uncluttered pages. More signal, less noise.
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