Pleaz help me!?

well y dont you like distract him when his about to smoke like ask him if he wants to go somewhere or do something and if he doesnt well drag him and do something fun like go play basketball or go to see a game or go speed racing ( not on the public streets) or take him to movies or something and start talkin to him from bro to bro and tell him how his life is gonna be like if he doesnt stop and that this is no joke his really hurting himself and you are hurting too seeing him like this and that it breaks your heart knowing that your lil bro who u lov so much is going in the wrong direction and is screwing up his life and tell him how great life is and what he has to live for