Goldsmith points out that the problem with feedback is that it focuses on the past (and blame!) rather than on the future (and growth). Feedforward emphasizes ideas that can help you do a better job next time, instead of analyzing where you screwed up last time. Imagine development sessions without criticism, defensiveness, or arguing about who was wrong and who was right. (Hey, imagine a marriage like that!)
Try the exercise Goldsmith uses. We found it a much more productive and respectful way to share ideas about how we can do better. And after seeing a group of twenty practicing, we were delighted by the energy and connection in the room.
Of course, we can't completely abandon talking about the past. But we can use feedforward more often than we think. It's a great tool for keeping communication positive and fruitful. And people eat it up.