Nathan's been staying up to write into the wee hours of the night. Talking with Dan about how he balances sporadic work habits with a cohabitating relationship, he drills down on a larger question: how do we decide what's important? As the cofounders exchange their ongoing rubrics for prioritizing tasks, they hit on something crucial about running a business: you don't just prioritize in order to get the work done—you do it to give yourself cause for optimism.