Related to that... the 'cd' section seems to be missing "cd -" (ATM).

    $ cd /some/really/long/dir
    $ pwd
    /some/really/long/dir
    $ cd ~
    $ pwd
    ~
    $ cd -
    $ pwd
    /some/really/long/dir

I'm pretty sure "cd" and "cd -" are my most used commands. CDPATH ranks pretty important too.

May I suggest [autojump](https://github.com/joelthelion/autojump/wiki)?

`please` don't use this in scripts. It makes it so hard to debug things later when the next guy comes along and has no idea where you end up after you pop. (can you tell this has been happening to me recently?!)