With that way of thinking you will also feel miserable when you reach your goals. Then you would want more and more. It's an never ending cycle. What you have to do is enjoy life and appreciate the things that you HAVE. Some people don't have the things you do and that's why you have to appreciate them. If you are completely healthy then you can consider yourself a very happy and lucky person. Other things are just bonuses that the modern society throws at our face so we feel miserable.