All I have to say guys; promises + generators. My god, it's absolutely delicious.

Seriously, just learn it. Get your --harmony flag on. It will be in browsers soon enough as well. It's literally the future of javascript and having converted some of my codebase to promises + generators instead of just promises. Wow. It felt amazing. Suddenly everything doesn't look like spaghetti.

I use bluebird for promises and a custom dev fork of Coffeescript that allows for generators. You do have to wrap your anonymous functions with "Promise.coroutine", but thats really it. You could always just not even use promises, and go plain generators too.