This morning we got a great question from one of our star users, Joel Hughes. Specifically, he was wondering how he could make sure that members from one Twitter list would not also appear on another:

This is a great question, because by making sure that each twitter list has unique members, you also make sure you don’t read the same tweets twice and thus can more efficiently pay attention to unique tweets.

What are some good use cases where this technique would be handy?

• To have a nifty list of people you haven’t talked to in a while 
• To create different priority level lists to read in order to save time

How Do I Do It?

Step 1: Sign into Formulists with your Twitter account

Step 2: Choose to add a “mash” list from the “Lists or Follower Sets They’re Already In” category.

Step 3: In the first line add a list or follower set of interest (ie: people you follow) and in the second add the list whose members you would not want to include in your final list.   Make sure to select “remove people from this list” from the drop down menu on the left like so:

Step 4: Hit “Create List” at the bottom and voila! You should now have a new stream dedicated to people you are following who are not already in another list of yours.