When l was at my first year in the university l was under lots of pressure and felt unhappy almost every day. l pushed myself really hard to get a higher GPA and be more athletic. l wasted a lot of time regretomg things l hadn't done perfectly and imagined what would have happened if l had performed better. This way of thinking is pretty toxic and it made me felt awful about myself. (Now l know its called Perfectionism.) One day l just decided to drop it and never regret things that had already happened. Of course it was not easy but l kept reminding myself and changed my mind in time. (or eventually) After a while, maybe two or three months, wonderful things happened. l performed better both in academic and physical activities. More importantly, l felt happier than before.