Rob Hayes Partner First Round Capital
“[One] thing that the hundreds of founders [he meets] each year have in common  is that their plan is wrong. Sometimes it’s the big things, sometimes it’s the little things, but the plan is always wrong. Founders who can pivot to a new idea given what they learn will survive their plan being wrong while those who believe that all signs pointing to trouble are wrong are not going to survive. 
[Here are lessons] that every founder should follow- start with a solid plan, but always listen to your customers, employees, advisors, and your gut. When signals suggest that the path you are on is not going to take you where want to go it is time to pivot.
So how do you pivot? Always be ready. Listen to your customers-they will tell you what they want. And when the time comes, pivot clearly and decisively. Understand what can be reused, what needs to be thrown away and what else has to be built. Ensure that your team understands the pivot and is on board. Manage your cash and make sure your business partners, including your board, understand [the pivot] and are supportive. [Assess] whether you have the right skill sets for the new direction.
 [Always] be assessing your situation and expect to pivot [to reach the destination].” Rob Hayes, Do More Faster by David Cohen & Brad Feld, copyrt 2011, Pg 201-202