Learn to eyeball sizes and weights. There are about three medium apples in a pound, about two large baking potatoes in a pound. Learn to recognize smaller amounts too. The next time you need a teaspoon of oregano, after measuring, dump the contents of the measuring spoon into the cup of your hand and learn what that teaspoon looks like. What a pleasure to be able to cook a sauce or casserole, adding spices accurately, yet without any measuring. When your recipe calls for a cup of shredded cheese, picture what a one cup measuring cup looks like. That will really help you recognize how much cheese you need. Learning all this takes a bit of practice, but really worth the effort.