4. Once you are up-to-date, it's time to install a graphical environment. I recommend installing LXDE as it is simple and light-weight. (Remember, you're running Debian with all the overhead of the Android operating system in the background, so it's best to conserve as many resources as you can.) You can either do apt-get install lxde to install the desktop environment along with a full set of tools, or apt-get install lxde-core to only install the desktop environment itself.