Without a definitive idea of what you want, you will struggle to attain it. You will most likely spend your life wanting something you think you will never get and hence, you will never get it.
To truly achieve success you must imprint your utmost desires into your subconscious, whether it be the house/car of your dreams or the million dollar salary.
Attention to detail is important, from the LED lighting in the Dash of your Lamborghini Aventador to the choice of floor tile in the 4th bathroom of your dream home.
Waking up every day knowing exactly what you want, makes achieving exactly what you want realistic.