Though I had read the first book on lateral thinking sometime back and was fascinated by the ideas of how jelly like the mind is, this post by Dennis Lewis makes to be a nice review of these concepts.
The whole notion of passive thinking which is natural thinking, to an active thinking which is learned and practiced is essential to getting unstuck in our lives.
Things need to move beyond. But how. There is nowhere better practical advice on this, than what De Bono tells. It is not about intelligence, but about wisdom.