Recently I've begun taking CP more seriously and practicing every day. I've been able to get to around 1100 but can't get past that. I've started trying 1100 and 1200 rated problems as those are the ones I struggle to solve in contest. With these problems I've noticed the solution is almost always simple but there's some key observation needed to be found in order to solve them (especially in math).I wanted to know if there's any particular way I should be thinking about and approaching these problems. Or are these observations just something picked up after many problems solved?