Edit: Due to the fact that this article is old, the installation instructions may not work anymore. In order to successfully install the latest version of LibreOffice, please access the libreoffice tag and open the latest article (the one on top).

The latest installation instructions for LibreOffice
As you may know, LibreOffice 4.0.3 has been released for a while. In this article I will show you how to install LibreOffice 4.0.3 on Debian 7 Wheezy.
Let’s start. Follow this steps exactly for a successful installation:
Add the backports repository on Debian Wheezy:
$ sudo su
# echo 'deb http://ftp.debian.org/debian/ wheezy-backports main contrib non-free' >> /etc/apt/sources.list
# echo 'deb-src http://ftp.debian.org/debian/ wheezy-backports main contrib non-free' >> /etc/apt/sources.list
Update the system:
# apt-get update
Install LibreOffice:
# apt-get -t wheezy-backports install libreoffice