When I created my main Joomla! site, I installed Joomla! using Fantastico, as described in this post.
However, I set that site up in a temporary folder while my original site was still running on HTML. When I finished the Joomla! site, I backed up the site (using JoomlaPack, now changing names to Akeeba Backup), deleted
Read the post at How To Manually Upgrade Joomla!

My Favorite Joomla! Extensions
Some Joomla! extensions you always use, some you only install when the situation asks for it. There are paid extensions and free, open source extensions. In most cases, you will be able to find the functionality you are looking for amongst the many free extensions in the Joomla! extensions library.
After a fresh install of Joomla!
Read the post at My Favorite Joomla! Extensions