While installing Lubuntu 14.04 on my laptop I found out the hard way of a bug in the installer regarding encrypted hard drive. To get around it you need to boot from the CD/USB and choose to try Lubuntu, open a terminal and run
# sudo swapoff -a
and then start the install. You need to do this before starting the install, since the installer remembers certain errors between runs except with a reboot in between.
PPA:s and other repos I like to add on newly installed systems:
Additionally I like to install git, guake, vim-nox and a few other tidbits.