A deadline is, simply put, optimism in its most kick-ass form. It's a potent force that, when wielded with respect, will level any obstacle in its path. This is especially true when it comes to creative pursuits.
If you have a million things to do, adding item number 1,000,001 is not such a big deal. When, on the other hand, you have nothing to do, getting out of bed and washing yourself before 2:00 P.M. feels like too much work to even contemplate.