Many years ago, my kids and I cleared out the storage container that my company had for many years. About 10 years earlier, one of our staff left the company and all of his boxes of documents were put in storage. 2x4s had been used to make rudimentary shelving for the boxes to sit on.
After we cleared the boxes out of the storage container and took them to the dump, we loaded up a huge pile of 2x4s into the rented truck. When we got home, we removed the nails and stacked the 2x4s in the back of my garage.
So, one day, I got this brilliant idea to build a deck in the back yard. The first step was to gather pallets. Then, the task at hand was to figure out how to take the random sized pallets we had collected and arrange them into a rectangle that would fit in the space we had available. This took way longer than it should have!