1. Write something every work-day, and preferably, every day; don't wait for inspiration to strike. Staying inside a project keeps you engaged, keeps your mind working, and keeps ideas flowing. Also, perhaps surprisingly, it's often easier to do something almost every day than to do it three times a week. (This may be related to the abstainer/moderator split.)
2. Remember that if you have even just fifteen minutes, you can get something done. Don't mislead yourself, as I did for several years, with thoughts like, "If I don't have three or four hours clear, there's no point in starting."
3. Don't binge on writing. Staying up all night, not leaving your house for days, abandoning all other priorities in your life -- these habits lead to burn-out.
4. If you have trouble re-entering a project, stop working in mid-thought -- even mid-sentence -- so it's easy to dive back in later.
5. Don't get distracted by how much you are or aren't getting done. I put myself in jail.
6. Don't fall into the trap of thinking that creativity descends on you at random. Creative thinking comes most easily when you're writing regularly and frequently, when you're constantly thinking about your project.
7. Remember that lots of good ideas and great writing come during the revision stage. I've found, for myself, that I need to get a beginning, middle, and an end in place, and then the more creative and complex ideas begin to form. So I try not to be discouraged by first drafts.
8. Develop a method of keeping track of thoughts, ideas, articles, or anything that catches your attention. That keeps you from forgetting ideas that might turn out to be important, and also, combing through these materials helps stimulate your creativity. My catch-all document, where I store everything related to happiness that I don't have another place for, is more than five hundred pages long. Some people use inspiration boards; others keep scrapbooks. Whatever works for you.
9. Pay attention to your physical comfort. Do you have a decent desk and chair? Are you cramped? Is the light too dim or too bright? Make a salute--if you feel relief when your hand is shading your eyes, your desk is too brightly lit. Check your body, too: lower your shoulders, make sure your tongue isn't pressed against the top of your mouth, don't sit in a contorted way. Being physically uncomfortable tires you out and makes work seem harder.
10. Try to eliminate interruptions -- by other people, email, your phone, or poking around the Internet -- but don't tell yourself that you can only work with complete peace and quiet.
11. Over his writing desk, Franz Kafka had one word: "Wait." My brilliantly creative friend Tad Low, however, keeps a different word on his desk: "Now." Both pieces of advice are good.
12. If you're stuck, try going for a walk and reading a really good book. Virginia Woolf noted to herself: "The way to rock oneself back into writing is this. First gentle exercise in the air. Second the reading of good literature. It is a mistake to think that literature can be produced from the raw."
13. At least in my experience, the most important tip for getting writing done? Have something to say! This sounds obvious, but it's a lot easier to write when you're trying to tell a story, explain an idea, convey an impression, give a review, or whatever. If you're having trouble writing, forget about the writing and focus on what you want to communicate. For example, I remember flailing desperately as I tried to write my college and law-school application essays. It was horrible -- until in both cases I realized I had something I really wanted to say. Then the writing came easily, and those two essays are among my favorites of things I've ever written.
The Happiness Project book is due out in January. In the book, I describe my experience writing a novel in a month, inspired by Chris Baty's No Plot? No Problem! Yes, you can write a real novel in one month. It was a lot of fun.
* I always find something great on Dumb Little Man.
* If you're starting your own happiness project, please join the Page on Facebook to swap ideas. It's easy; it's free.
Follow Gretchen Rubin on Twitter: www.twitter.com/gretchenrubin