Starting out, I wanted to try and get the big things right. I found the key to doing that was sweating a lot of small stuff. Before I knew it, big things were going pretty well. Tending to stick with what worked, more sweat was generated on small stuff and big things went on autopilot. Big mistake.
Sand castles are created from the organization of many small things, all part of the Whole, with a larger purpose in mind. You need a solid foundation and a vision, which can change during the course of construction. And once built, maintenance is required for it to "last". For all castles made of sand slip into the sea, but they are great fun while they last, built from small things but always a part of a much bigger thing - being at the beach.