Twitter is an unusual application: it's a cross between instant messaging and blogging.
My first reaction to Twitter was that it was completely useless for any writing purpose. But...
It's addictive. You've got 140 characters, around 25 words, to say whatever you want to say in your "tweets".
So after trying Twitter, I've come up with these uses for Twitter in your writing processes:
* A mini-blog. You've got 25 words to make your point - just right if you're blogging in the odd five minutes here and there. You don't actually set up a blog - you just tweet whenever you have something to say;
You can "blog" with Twitter using your mobile phone, Instant Messenger, via the Web site, or via a desktop application like Twitterific;
* A link blog - post any URLs you find useful to Twitter, and you can find them again quickly, as well as share them with friends;
* As a writing journal. Each time you complete a page of your novel, or an article, post to Twitter. This gives you an idea of how much you're writing - or not writing, if you're procrastinating;
* As a collaborative tool. If you're working on a project, you can send a tweet to let others know what you're working on. If you're using a Web application like Google Docs, post the URL so that others can update it.
How do you use Twitter? Share your thoughts in the Comments.