Watched a young guy on a job in Buffalo lay a course with a level he never checked, then I remembered my own first month
Last Tuesday on a house in Buffalo I watched a kid lay a full course before touching his line. He set the block, tapped it twice, and moved on. The bubble on his level had been sitting on the wrong side of the mark since his second course. I did the same thing 22 years ago on a garage in Cheektowaga and had to tear out 3 courses before lunch. Nobody taught me to check the level against itself, just flip it and see if the bubble reads the same both ways. That 10 second habit is the reason my corners still line up after all this time. What is the one small check you do every single course no matter how rushed the day gets?
I used to roll my eyes at the old timers who did this stuff, figured they were just stalling or being fussy about nothing. Then I got humbled on a retaining wall where my level had drifted and I stacked 4 courses before I caught it, and let me tell you, tearing that apart in the rain changed my tune real quick. Now the flip check is the first thing I do on every course, even if it means the helper is standing there waiting on me. It takes no time at all and it has saved me from way more rework than I can count. The other one I never skip is checking my story pole against the actual course height, because the block always runs a hair off from the math.