Install LibreOffice in Ubuntu Precise: Easy way

On my primary production machine, I have Linux Mint 13 Cinnamon and it has LibreOffice 3.5 as the main office application. Whereas LibreOffice has already moved ahead to Even Ubuntu Quantal repo has build. Today I thought of experimenting with LibreOffice and install the latest available version from LibreOffice website. I downloaded the LibreOffice for Ubuntu from