I deleted my launcher panel when I just wanted to delete a launcher. How do I start making a new panel?

You can reset the panels back to default by writing the following in a terminal:

gconftool --recursive-unset /apps/panel && killall gnome-panel


To transfer your panel settings from one computer to another, do the following:

gconftool --dump /apps/panel > panel-settings.xml

Then copy panel-settings.xml to your other computer and on that run:

gconf --load panel-settings.xml
killall gnome-panel

If you have another panel left, you can select "New Panel" from the context menu. Then you can position it and add your applets again.