Remove unused locales
Locales take some disk space (~600MB on my machine). With small SDD it might be worst to clean them up.
For that you need a tool from AUR:
yaourt -S localepurge
Then edit the config file
vi /etc/locale.nopurge
And change following lines:
#NEEDSCONFIGFIRST
[...]
#####################################################
# Following locales won't be deleted from this system
# for example:
en
en_GB
en_GB.UTF-8
en_US
en_US.UTF-8
de_DE
de_DE.UTF-8
fr
fr.UTF-8
de_CH
de_CH.UTF-8
The last step is to execute the purge command
sudo localepurge
On my system it frees up almost 600MB of uneeded files :-)