4. After choosing which of your email contacts to follow, click Next or 'Skip this step'. Now you can upload a photo of yourself and type a short Bio. This should help people to identify you, perhaps professionally, and may also tell people a few things you like. You can keep your bio impersonal if you don't want people who don't know you to identify you if you prefer.
5. Click Done and you'll be taken to your Twitter timeline. Your information is at the top left, with suggestions of people to follow and trends below. To the right is the timeline itself with the latest tweets at the top.
6. Post your first tweet. Type a message to a friend in the Compose new Tweet… box. Type @ followed by the first few letters of the person's name and it should autocomplete. Click the Tweet button and you'll see the message appear in your timeline.
7. Right at the top are Home, Connect and Discover links. Click Connect to see who's mentioned you in a tweet and any interactions, such as people who followed you, replied to your tweets or retweeted one of your tweets to all their followers.
8. Click the head icon at the top right to see a menu with other options. Here you can view - and reply to - direct messages, sign out and change settings. Settings include email notifications and the background image behind your timeline.
9. You're not limited to using Twitter's own website. Other programs include TweetDeck for Windows. Plus, there are apps for iPhone, iPad, Android, Blackberry and Windows Phone 7 so you can tweet from your smartphone or tablet.