I always thought the "one foot on the ground" was what it meant. You figure out a way to keep about half of your current strategy or assets or whatever fixed bu

I always thought the "one foot on the ground" was what it meant. You figure out a way to keep about half of your current strategy or assets or whatever fixed but applied in a new way to a new context, and change/recreate the other half. This is sort of what Microsoft is trying to do with Windows 8, they are keeping about half of their OS the same while radically changing the other half. Compare with music theory for example - "pivot tones" are a way of making a smooth connection between chords in a harmonic progression, by keeping one or more notes the same while changing the others. Through a sequence of chord changes you can end up somewhere harmonically radically different from where you started, yet still keep each individual step smoothly connected to what came before.