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.