How can I be 110% disciplined and motivated everyday

I'm 19 years old and I'm bout to enter college. I want to bust my ass everyday to be at the very top of my classes like I was in high school. Not just in classes but in life as well. But for some reason I feel like not getting up at all and just playing video games all day. I have big plans for myself in 2025. I want to be the very best in my classes and also want to get into my first relationship. How can I always stay on the grind even when I feel like slacking off?