HOWTO: Free Up Resources under Ubuntu Server

Ubuntu Server ships with a few expensive (memory, CPU, disk) periodic processes which are quite unneeded and suck up precious resources on Amazon EC2:

apt-get remove landscape-client
apt-get remove consolekit
apt-get remove update-motd
apt-get remove update-notifier-common
apt-get autoremove

Reclaimed 20% of my RAM right away - also, CPU and swap usage dropped like a stone. What are these? They run periodically to notify you of package updates (you should know how to do this yourself) and update the /etc/motd file whenever someone logs in. Completely superfluous memory usage.