Another fun thing to do is use an empty entry, like mv .xinitrc{,.bak} or, if you have some stuff mounted under another mountpoint, such as when installing

Another fun thing to do is use an empty entry, like mv .xinitrc{,.bak} or, if you have some stuff mounted under another mountpoint, such as when installing gentoo: umount /mnt/gentoo/{proc,dev,boot,} That empty entry expands to the base path, which can be a nice shortcut.