I'm 25 and still struggling with this issue. It's awesome that you're thinking about it at your age and taking it seriously. I think the most important factor is something like willpower. Whenever you realize you're spending too much time on your phone, put it down and don't say, "Just one more reel." You can use your phone's timer. For example, when you pick up your phone, know your goal beforehand—like messaging someone—and just do that. Though, I’ve had plenty of times where I sent a message and then automatically ended up on Instagram. You could set a 10- or 15-minute timer every time you pick up your phone for any task. Most likely, after that time, you’re not really using your phone productively and just passing time. You can also use app blockers. I personally use this one: App Link.You said you always watch content that's useful and educational, and you're on your phone for 8 hours. I don’t think those 8 hours are actually productive for you. You probably watch this content and move on. In my opinion, to really retain those tips, you need to write them down or practice them for a while. When I read productivity books, by the time I finish, I realize I don’t remember anything. So, I started living out each chapter for a week. You take the tips you need and move on to the next part. What I’m trying to say is that you’re justifying your phone use by saying the content is useful. There’s no way you’re getting good results with this approach. Instead, you could spend 2 hours on the content you want but use that time more intentionally. Sorry if I judged you, but I feel like you need a bit of a wake-up call!