My chances of achieving my current American Dream are slim to none. However, as we become older, our dreams change and we take different perspectives. I will have a different dream by then and my dream will be much more possible to achieve.
As you live through life, you should have several. Once you achieve your first dream, go on to another. This keeps you motivated and while enjoying fruits of your first dream, you have the 2nd dream to look forward to. Basically for me was marriage, children, comfortable standard of living, successful rearing of child, early retirement, and finally having healthy and prosperous golden years.