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.
Squandering time is a luxury of profligate youth, when the years are to us as dollars are to billionaires. Doing the same thing in middle age just makes you nervous, not with vague puritan guilt but the more urgent worry that you're running out of time, a deadline you can feel in your cells.
I never expect appreciation. I always set a deadline for the things I have to do to be a successful person, when I complete them, I give myself a piece of candy, a glass of tea and some free time to enjoy- that is how I honor my hardworking and appreciate my struggles.
I'm convinced that fear is at the root of most bad writing. If one is writing for one's own pleasure, that fear may be mild — timidity is the word I've used here. If, however, one is working under deadline — a school paper, a newspaper article, the SAT writing sample — that fear may be intense.