Unity Video Tutorial
Or if needed it is fairly easy to get back to the 'classic' gnome desktop as opposed to Unity.
You can just run this in a terminal:
Reboot and then select "Gnome Classic" on the login screen.Code:sudo apt-get install gnome-session-fallback
For a detailed walkthrough, check the page here.
Also note: In order to make changes to the panel settings, you have to use alt+right click, instead of just a regular right click.