Well, currently I'm not working (yet; I just got a job with Starbucks and I start in a couple weeks ouo) so the only thing that takes up my time besides comics is, well, school, which is average of 6 hours a day. When I start working though, it'll just be part-time, so I could be looking anywhere between 18-24 hours a week, if I'm lucky.
Right now though, and in the future, the way I find time is simply to -make- time. If I have to sacrifice a few hours of sleep, so be it. Anytime I'm not working, I'm drawing. If I finish assignments early in class, I don't sit around twiddling my thumbs - I work on comics. If I want to play games, I'll finish the project I'm working on and then reward myself with maybe an hour or two of gaming. Eleven in the morning on weekends is my gaming hour - so from eleven to around noon-ish I'm mostly playing Mario Kart, and then after that it's all drawing and comics for the rest of the day.
So yeah, I'm pretty busy xD But I make the time as best as I can for everything, and balance is key u o u