The first 80% of practice was composed of stretching, warm ups, jogging, drills, specific game prep, scouting other teams and more, and was long, mentally and physical arduous, and most of all, back to back to back, with little free time (outside getting water). The remaining 20% of practice was transitions, and there practice 'transitioned' to a time where there was more free time. That first 80% is high school, where you have so many different things going on, that free time is virtually absent. College is like that last 20% (and the way time flies, it feels like that's about much you're in college compared to high school), where you still have stuff to do, but you now have free time that you have the responsibility to manage.
When, I first got to South, I had no clue what to with free time. My freshman classes were rather easy to me (outside MET 140 and PH 201), and I spent most of my free time at the rec or sleeping. I'm fairly confident that I averaged 10-12 hours of sleep a night my freshman year. Now, as a Junior, my classes are incredibly difficult, plus I have a job, in a Fraternity, involved in multiple organizations, do research, and on a student meteorologist team, free time is rare, and in very few interspersed bits.
The best way to manage free time is to have a planner. In that planner, write EVERYTHING down, both academic and fun. Use this to make sure you aren't double booked, too overwhelmed in one week, etc. Another great way to manage free time is to have a wipe off board that you update weekly with every major assignment, event, or meeting you have that week. I currently do this, and my board has: MET 356 test M, LG 231 quiz M, Mortar Board meeting M 7:15, MET 410 paper due T, ATO Exec. Board Meeting 7:00 R (Thursday), MET 354 SI 7:30 R, LG 231 quiz F, Work MWR. Now, other than you viewing my incredibly busy schedule, this allows me to know when I have time to work in other smaller homework assignments, time with friends, service hours, etc. It is extraordinarily helpful to do this, and have been very helpful for me as well.
I never thought I'd compare volleyball to going to college... but, I did!