Manage the present, selectively abandon the past, and create the future

Over at Vijay Govindarajan’s blog, I came across the 3 box strategy below. Mr. Govindarajan refers to the model in, for example, this posting and this posting. Please note that Mr. Govindarajan recommends that companies spend time and attention on all three boxes, particularly box 2 and 3. He also notes that “too many companies ignore these two boxes until it is too late.” Reflecting on what Mr. Govindarajan writes, I also thought about the management dilemma "efficiency vs. trying out somethings new" that I wrote about in this blog posting.

How much time do you spend on box 1, 2, and 3 respectively?