Please check out this wonderful piece by New Yorker cartoonist Drew Dernavich, in which he discusses his creative process for a cartoon.
He submitted it in 2007, but it was rejected. At that point, he did NOT do what many perfectionists would do, which is to either: (a) despair, and maybe give up cartooning, or (b) grind down and start reworking the cartoon to death, probably bringing all his other work (not to mention, his life) to a standstill.
Instead, he simply set the cartoon aside and moved on to other projects. He did that for six years!
Dernavich is demonstrating the essence of liberated creativity, which is to have a lot of ideas and projects going at once, switching joyfully among them, and letting each mature at its own pace.
In The 7 Secrets of the Prolific, I quoted the late, great Isaac Asimov, author and editor of more than 500 books and 90,000 (!) letters and postcards:
Note Asimov’s absolute sense of freedom and dominion (author-ity!) over his work--expressed not in grandiose terms, but the simple ability to do whatever he wants, whenever he wants. And, of course, the total lack of blame, shame, compulsion, and perfectionism.
This technique also works on long works, except that, when you get stuck, you switch to a different section of the same work. (And even then, you might sometimes take a break and set that work aside to work on something else.) Click here for instructions for that technique, which I call The Writercopter.
What if you have a deadline and can't just switch projects? This could admittedly be a short-term problem. In the long term, though, this system helps ensure you never arrive at a deadline without something to submit. Say you've got four reports and four newsletters due for your job throughout 2014 (or twenty blog posts). Start working on all of them now, in bits and pieces, and do a little more work on each, each week. You'll have plenty of time to mature them, and will probably wind up getting many of them done ahead of schedule.
This "having a lot of material in various stages in the hopper" technique is one that pretty much every prolific creator I know uses. It offers the least-pressured creativity process around, so I hope you will try it out.