[stephenr]

The same indentation Python uses in lieu of closing curly braces, can help your issue, so instead of:

    [].map(function (foo) {baz(bar(foo))});

You could write:

    [].map(
        function (foo) {
            baz(
                bar(foo)
            )
        }
    );

Alternatively (or in addition to that), use a decent IDE, which will highlight matching parenthesis, curly braces, allow code folding, etc.

I've never heard a builder say "I don't like screws, nails are better because they work better with my hammer".