Lessons. I hated when, in elementary school, my teacher would ask us to open our lesson books. Writing this column is full of lessons, too, but it's more on discovering limits, remembering them, and listening to instincts rather than spelling potatoes and tornadoes correctly. For example, when my instincts say "going from the West 20s to Varick St. and then back up to the West 20s again isn't going to be worth it" I need to listen. But everything happens for a reason and usually, the night that ends unexpectedly burps up a fun slate cleaning surprise.