Organize your Twitter space with new Lists feature
If you have been using Twitter for a while, your Twitter Home page is probably becoming a blinding jumble of unrelated messages. Because all your feeds pour into the same space, you need to do a lot of weeding to find what you want–that is, if you have the patience. Now, with the new Lists feature, Twitter allows you to categorize and filter tweets in any way you like. Just create and name one or more Lists and then assign people you are following to your various Lists.
Here’s how:
In your Twitter space, click the Profile link at the top of the page. Under your username, click the Lists 
button and choose New List. You can name your list anything, and make it Public or Private.
Once you have one or more lists, in the “Following” section on the right of your Profile, click the View All link. To the right of each of your followed usernames is a List button: 
Click this button to see your lists, and then assign the selected username to a list.
Your Lists appear in the right section of your Home or Profile. Click a list to see only tweets that have been assigned to that list.
May 6th, 2010 at 6:50 am
There is a program called twitter adder, which is amazing just google it.