When I was in college I decided that if I was gonna make music my living I was gonna start appraoching it like a job and started to practice 8 hrs a day (that didn't include the jam sessions, gigs, and teaching I was doing).
Looking back on it I'm sure glad I did it (sure I missed out on a lot of great parties)but it has really paid off. Now that I'm making a living playing/teaching I wish I had 2hrs a day to practice what I want too. Put the time into it while you can, because you never Know what tommorrow brings.