From a more practical point of view, your chatter is your mind going through it's habitual cycle that it continually does all day. Your conscoius mind has I think 7 slots to hold information, in the form of the five senses. One non-meditative trick is to consciously fill these slots with something else, thus breaking the cycle. A neural linguistic programming approach would be to look up and visualize some pictures, look down and to the left and listen for a sound or inner dialog, and look down and to the right and feel a body part or two with your mind, thus filling the 7 slots with pictures, sounds and feelings. They have found that when you look in those directions, your mind accesses those things. I don't know if it is useful here, but I like to pour fuel onto a raging fire...
The SFQ active exercises and small universe already have enough to fill many of those slots. I like the previous idea of adding more to the visualizations and feelings, which keeps the focus on SFQ and fills more slots, thus preventing the slots from being filled by our habitual thoughts, as long as your mind is not too busy.
