okay,my sister taught me this four main principles to achieving your goals or trying to get what you want.

the acronym is DUTY,which means(not in sequence):

D-DOA.with a lot prayers and praying to God,insyallah your prayers will be answered someday.
U-USAHA.with great effort,you can go far.don't just hope that by praying hard,you will able to make it.effort is important too.
Y-YAKIN.with self-confident and having the confident to achieve and get what you what.
T-TAKDIR/TAWAKAL.after all the efforts,self-confident and praying hard and you didn't get what you want just leave it fate and let the fate take its route.accept the reality and the fact.