How can I fix overmixed cookie dough to ensure my cookies turn out perfectly?

To fix overmixed cookie dough, try adding a little bit of flour to help bind the ingredients together. Be careful not to add too much flour, as this can make the cookies dry and tough. Another option is to chill the dough in the refrigerator for about 30 minutes before baking, as this can help the dough firm up and prevent spreading during baking.