Found this post from Rebel Stance on Execution: Mystery Entrepreneur. It reminds me of why even great ideas can go south without execution.
I like their thought on who you surround yourself with. In other words, it's important to stay away from non-believers. Those are the people who always see things "not working out." That said, it is important to have coaches who will tell you the ugly truth.
When the next great idea comes don't forget the execution (air in the beautiful red balloon).