Before you do any kitchen renovation of your own, make sure to plan the layout wisely. You can’t just doodle cabinets and extra tables on your notebook without checking if it’ll contribute to the betterment of your kitchen.
Have you heard of the “cook’s triangle”? If yes, then good for you. At least you won’t sacrifice mobility for grandeur spaces. But if not, then let’s put it this way: the cook’s triangle is the area where the cook occupies most of the time. Since the sink, the refrigerator and the stove are the three most vital parts of the kitchen when cooking, the space in between those should form a triangle (you can draw a line from the sink, then the ref, and the stove and back again to the sink to make a triangle). The more equilateral the triangle is, the better.
Photo taken from http://www.marlbol.com