Step One: Turn 20.
Step Two: Have the world's best boyfriend. Now unfortunately, since I have the world's best boyfriend, you will have to find a substitute. Good luck.
Step Three: Make some incredible friends before turning 20.
Step Four: Be so oblivious that you don't catch on to the world's best boyfriend and your incredible friends planning a surprise party for you.
Step Five: Start planning a bomb-ass thank you.