Imagine you have a list of items that you want to categorize, or in some way associate with another piece of data.
For example, you have a list of items, and you would like to have them associated with their categories.
One idea I had was to have the groupings off to the left, and you could drag and drop the item onto the appropriate grouping and it would then add the item to the listing.
Then you end up with this:
But is this the best way? Is there a better way?