Always be watching time. The tension between operating leverage and scale-up investment is really dangerous. At Marketo, we got to it late, our growth slowed a little too much. Live in the real world and focus on cash and on making the investments so you have the capacity when you need it. Have a long-range planning process and understand the day when you’ll need $2 million of ramp capacity. Don’t let the tyranny of a seductive short-range model triumph over what the real world is telling you about the dynamics of growing the business. Understand what it takes to really scale.