What's your twitter name?
To really get it, you need to follow lots of people and, in turn, have lots of followers. You also need to start tweeting, so that you get 'seen'!
There are loads of MNetters on Twitter, so if you start by following them that's a good thing to do. Also, have a look at their followers and who they're following (if you're on Twitter - as opposed to other applications, such as Tweetdeck - you can see who followers are by looking at people's profiles), and start to follow them.
There are lots of news sites which are always worth following - BBC, ITV and Sky all have them. There is an American site called Breaking News, which can be interesting.
Then it's just about what kind of interests you have - if you're into politics, there are all kinds of politicians and journalists and bloggers who are on Twitter.
Equally sportsmen and women.