Measure in the flour, baking soda, and salt. You can do this in a separate bowl, but I usually just dump it all into the mixing bowl. Slowly mix with the electric mixer on low speed, scraping the sides, until all the flour is incorporated. If the dough sticks to the sides of the bowl and looks wet, add one tablespoon of extra flour at a time until the dough feels dry and sticks together in one large ball. Too much flour will make the cookie stiff, so stop adding flour right when the dough starts to take on that dry look and feel. Stir in the chocolate chips with a wooden spoon.