In most cases we suggest to use two different Joomla installations.
First, on subdomanin or test folder install Quickstart - to check how all works
Second, on root folder install "naked" Joomla 3.3 with no demo content - then install selected template and modules.
And add your real content: build content structure with all categories, menus etc.
Using this simple tip - you will have full control what you really need and what you need to add.
Because you can always change template to another one.