Did the foreman also tell you to stop eating gas station burritos before a pour? Because I learned that lesson the hard way on a slab last summer, and let me tell you, the crew was not happy with me. But yeah, on the water thing, I used to be the worst about it. Truck shows up, mix is stiff, I'm standing there with the hose like I'm watering my grandma's tomatoes. Had a guy on a job in Broken Arrow chew me out for it too, said I was pouring weak concrete and I'd be back patching cracks in a year. He was right, because that driveway looked like a road map by the next spring. Once I switched to a plasticizer and left the water alone, the finish started coming out way better and the cracks pretty much stopped.