How to become a better hockey player?

ok so i am 15 about 125 pounds and i used to be a descent house player but when i went high school i went to a prep school and i made there jv team. so i started getting better with practice then i started doing clinics. i was skating like 16 hours a week for about 5 months. then i made a AA travel team. So i developed my skills i am probably the best skater on my team. i am pretty good at stick handling i have a terrible slap shot and i good wrist shot. I do amazing in practice but when it comes to the games i just do terrible sometimes, like i will lose the puck alot p it to the place where no one is no one. Also during the breakout a guy has to go on the half wall and get a p and turn up. when i am on the wall i get it but i always end up ping it to no one or giving a buddy p cause i was to late. and how do you saucer p i know its from the heel but mine just isnt isn't. So basically i just am good in practice but in a game i choke or something and mess up and do bad