Best method of devotion to learning Japanese?

I currently own all three levels of Rosetta Stone Japanese, plus Barron's Japanese Grammar book, which I've heard is a very good combination for learning Japanese. Unfortunately, I'm easily distracted when I'm going through a lesson, and I find myself on facebook, making music on FL Studio, or texting people instead of continuing through my lesson. I'm also ALWAYS out with friends so I rarely have time to use it, and when I do my progress goes right out of the window and I have to restart the entire software every time I use it, because I know I haven't learned anything . I have ADD, which I know is probably the reason as to why I have difficulty focusing and taking my learning seriously. Being stoned doesn't help either, even though that calms me down most of the time. Are there any good methods of devotion to concentrate on Rosetta Stone and successfully retain the Japanese I've learned each time? I'm 16, so I figure it'd be a good head start to begin piling in linguistic knowledge now, since I plan on going to Pepperdine University for International Business and Philosophy. But this great opportunity would be greatly wasted if I simply couldn't stay focused on it. Thanks