An overview of several resources I use building Joomla websites:
Joomla Latest version
Always make sure you use the latest Joomla version or the latest security update for your website. Subscribe to a mailing list of your choose to keep you informed of the latest updates.
Joomla SEF Patch
Using the Joomla 15 SEF patch give you a lot more options to improve your website for search engines, You can have the best general SEO option set extended and create seperate HTML Titles for each page on you Joomla site.
This will prevent duplicate titels for you pages. You can choose between the free and the paid version.
Free Joomla Templates
Joomla 24 has a great set of free Joomla templates and using the Gallery function you can easily find a great looking free template for your website. Templates are available for all versions of Joomla, including the new 2.5 version.
Please check the license that come with the template to see if its fits your need.
Premium Joomla Templates
ThemeForest offers Joomla templates from various designers and brings them to you for very affordable prices. Prices range from $10 up to $45 and if you go by the rankings you will have a great template with documentation on how to use and set-up the template for best performance and usage.
Joomla Hosting Providers
Besides giving graet value for money on hostingplans you will have the 1-Click Joomla installer with the latest version of Joomla ready in minutes.
HostGator uses suPHP for PHP making your site even more secure. Use this code to get a 25% discount on signup: PATHOSBLOG25
Simpleweb is different then your normal hosting company… they offer a fully hosted Joomla service for your websites with a simple click installer and automatic updates.
Joomla offered as Software as a Service will take a lot of work on upgrading and securing your site away from you so you can focus on working on your content.
For a full set of features check out Simpleweb
These are the books about Joomla that are currently on my desk for reference and ideas.