moc
mv
cp
rm
rmdir
mkdir
vim
sed
grep
ls
cd
modprobe
su
sudo
mount
pacman

vim
cp
rm
ssh
git
sudo
gcc
gdb

Hey, I love me some "wall"

The ones I use most often, though they're all rather handy. ;)

pacman
irssi
mpd/ncmpcpp
tail -f
vim
cat
git
gem

Nice, a lot of Arch users around. /wave

Looking at my recent command history, I use cd, ls, df, ceni, clear, ps, top, htop, rm, sux, sudo, mv, apt-get, and more frequently, and lately, since I've been doing some simple editing, often of the clipboard or just a few minor changes variety, I've been using the small, fast GUI editor Leafpad. I use both Vim and GNU Emacs when I am doing involved work, depending on the nature of that work.