Krasinski's closing message strips away all the anxiety about what comes next. He's spent the speech addressing different kinds of nervousness: fear of the unknown (how else have you approached each new tomorrow?), fear of failure (how have you defined success — isn't it just being onto something, taking an idea farther than it's ever been?), and fear of the world at large (real change is organic; the weight of responsibility to change it overnight does not belong to you). His answer to all of it: what you did here is what you do out there. Hold fast to what you lived. Don't conform. Remember the discomfort and the elation. Find your people. Take chances, fail big, believe in something, fall in love as many times as it takes. And before you do something special, just do something.