Here’s what the research says: as you approach 50 hours per week, your productivity drops sharply. And, as you approach 55 hours per week, your productivity nose dives. Classic illustration of diminishing marginal returns. The research implies, obviously, that we only have so many golden hours per week. If we dig a little deeper, something else emerges. The “something else” is that since we only have so many good hours per week, what gets our attention and effort? The limitation on our productive time forces choice. It forces us to decide. Some don’t think they have to decide. “If I just work longer, then I can do it all.” Nope. But consider this a good thing. Limitations force creativity. Limitation forces thought.  Since limitations are inevitable, why not take advantage of those limitations? Why not allow your competitors to chase after everything and dilute their efforts while you laser focus on the most essential? It might become your competitive advantage.