10 points instantly if you answer my bball question well?

wHAT CAN I DO TO PRACTICE MY FORM at home. When i play ball im getting tired that i keep changing the way i shoot. I am also goin to practice in the park but i want to do something at home as well. The form i love is reggie miller type form and i light it up but i cant shoot like that in the game i shoot different. I change my form and i want to be consistant with it. That is really holding my game back. Any tips