How can I add links/launchers icons to Gnome 3 panel in Ubuntu 12.10?

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http://askubuntu.com – I'm a Ubuntu 12.10 user, and I want to know how to place link icons in the Gnome 3 panel. Does anybody know how to solve this matter ? P.S.: In the Gnome panel I don't have the on/off button and the other icons on the upper right corner of the screen. Please help me ! :) (HowTos)