Build on solid foundations while preparing for the future.
This is the one principle stated in his own words, and it is worth taking literally. It describes a tension rather than a preference: the foundations are the businesses that currently pay for everything, and preparing for the future means diverting resources away from them towards businesses that do not yet earn.
Most organisations resolve that tension by defaulting to one side. Groups that only defend the foundation become obsolete; groups that only chase the future run out of cash. Holding both simultaneously, across decades, is the actual work.