Its an important way that the company stays innovative and continues to grow and do interesting things.
"About 70% try to work on the core efforts of the company," explains Brin, "about 20% goes to adjacent areas and expansion, and for the 10%, anything goes.
Now what's true for organizations, need not apply to individuals. There are rewards for complete focus and excellence at what you do.
However, there's an argument to be made that, similarly to stay innovative and grow, a lens of 70/20/10 may yield optimal results for an individual as well.
What's your 70/20/10? :-)