ImBob

As I'm sure you know, masturbation is a normal and healthy part of being a teenager, and masturbating a lot is also normal for teenagers. You've recognized that your habits are consuming a lot of time, which means that you might be taking it to an excess. My main recommendation is for you to try and find other activities and hobbies/interests that will occupy your thoughts and keep your focus away from masturbation. The other possibility is for you to imagine repulsive things whenever you feel like masturbating or when arousing thoughts enter your mind. It's the classic "naked grandma" trick: just try imagining something that turns you off completely whenever you don't want to think about masturbating.