Roll your own (distro) remix with Relinux

http://www.howtoforge.com/creating-your-own-distributable-ubuntu-dvd-relinux

‘Best’ apps of 2011

http://www.addictivetips.com/ubuntu-linux-tips/best-60-linux-applications-for-year-2011-editors-pick/

Fix your tags and organize your music from the command line

http://www.webupd8.org/2012/01/beets-command-line-tool-to-fix-music.html

Start a virtual machine from the console (KVM)

http://www.rootninja.com/autostart-a-kvm-virtual-machine-from-the-console-with-virsh/

Automate your desktop

http://ostatic.com/blog/automating-the-linux-desktop-with-autokey

Disk analysis at the command line

http://blog.urfix.com/analyze-disk-uage-ncurses-disk-usage-ncdu/

Vim quick reference

http://tnerual.eriogerg.free.fr/vim.html

Learn scripting

http://linuxcommand.org/index.php