I propose writing modules like this:

!function() {
}();

This saves us from a problem that has bitten us in the past, where the following modules work in dev:

// Module A
(function() {
}())

// Module B
(function() {
}());

But blow up in production when the two files get concatenated (note the missing semicolon in Module A). Starting modules with bang (lol) is the shortest possible way to prevent this; ASI will kick in because of the bang and prevent the module from being incorrectly interpreted as arguments to a function call.