If you find yourself doing a series of `cd` and `ls` commands frequently, I feel like you might be using `cd` and tab completion ineffectively.

Instead of doing:

    ls
    cd foo/
    ls
    cd bar/
    ls
    cd baz/

You can do:

    ls
    cd foo/<tab><tab>bar/<tab><tab>baz/

This isn't what it will look like, it's just the key sequence (if this doesn't make sense let me know and I'll try to explain better). <tab><tab> will list all the possible completions, which is equivalent to an ls, without having to type in an ls and then another cd.

You can frequently avoid even more `cd`/`ls` shenanigans by judiciously using `pushd`.