Not a trick, but an important tip for Joomla! Web Developers: Don't forget to utilize the Joomla! Site Showcase.  The showcase is a free, volunteer-managed place to display the power and extensibility of Joomla!.  Being a highly moderated area for 'good' web sites, the showcase also appears to have a great Search Engine Optimization (SEO) value with Google.  This makes sense, as Google increasingly emphasizes 'brands' and 'trust' in search engine metrics.

We recently submitted our site for Alcast Technologies to the showcase and were surprised by a corresponding surge in visitor traffic and customer inquriries as a result.  So Joomla! Web Designers, what are you waiting for?  Submit your site!