If you haven't read the book, then it revolves around this question: "What's the one thing I can do right now, that by so doing will make everything else easier or unnecessary?"
The hardest part.... is choosing only one thing.
You see it's easy to say, "build a funnel!" as our one thing.... and maybe that's legit... but it's usually a copout to keep us from narrowing it down. Now don't get so micro as to say, "my one thing is to click my mouse on the browser window"
What's the right balance?
Personally, I find narrowing it down until I take immediate action is usually the key.
With that it mind.... what's the one thing you can do right now (after leaving an awesome comment) that by so doing will make everything else easier or unnecessary?