moving joomla content site to wordpress..

Hi there,

Moving a joomla content website to wordpress.
I have already installed a localhost in a usb driver (as soon as it gets the way I want I will move it to the net).
Also I was able to get this done:
- A multisite installation with plugins and themes and so on.
- created a subsite so I know it is working.
Now my question:
What is the best way to get the most content moved from joomla to wordpress?
The content will be moved to the "main/root" wp site.