Before you do anything else on Twitter, sign up for an account at Twitter.com (it takes just a few minutes), and then spend 5 or 10 minutes a day clicking around and learning how people use the service. Make it a point to follow at least a few interesting people and institutions. (On Twitter, you can get a feed of somebody else's messages by "following" that person; unlike on other social networks, there's no need to get permission from them.)
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