Another Twitter tip: It's a good idea to really use the hash tag (#). You can put it at the end of a tweet to denote what it was about.
It doesn't take long to get an idea of what the best, and most popular hash tags are. For instance right now with the Australian election result still to be decided, the best hash tags are #hung #auswaits and #ausvotes. All the Aussie political junkies on Twitter are searching these constantly.
Of course, there are many other popular hash tags for any subject under the sun. So if you cut your tweets back to the bear minimum and put two or even three of them at the end of each, you can snag a lot of new followers. If your tweets are good, of course, they are more likely to be retweeted.
And just as you can use the hash tag to help other tweeps find you, the reverse is true. Just do a search of your favourite ones from time to time and you're sure to find people you want to follow.