Trouble With Distractions

My mother has told me many times not to leave the kitchen while cooking.  It turns out she's right.  I made a mistake while cooking lasagna tonight.  I added the cheeses to the sauce rather than making them their own mixture.  I left the room and hadn't read the steps right.  The lasagna turned out okay---but next time, I have to read the recipe correctly, and stay within earshot of the kitchen door.