Did my 4 year BS in 3 years. Worked about 20 hours a week in between.
Didn't do anything hardly for the first year and a half.
Second half I got more focused in my major (business minor was done) so I could focus on things I liked doing. Still pulled 17-20 credit hours a semester but now got involved in Frat activities with my Frat roommate.
Last year and a half was work hard play hard personified. Between course overloads, and parties, I hardly ever slept. Totally worth it.
Graduated with honors, hit the workforce.
Now overloading my Masters and working 60 hours a week. I still never sleep.
Will have my Masters before I'm 24 (next Spring graduation). I dont even know what I'm going to do with that spare time. I've gone so many years with the pedal to the floor I feel antsy anytime I have a break. I have Forza 4 from Black Friday last year and its still in shrink wrap. I like games, but I feel guilty playing them.
I feel if I could offer advice, its that you should balance. You've already heard from people who drank and partied their way through and turned out fine. I'll tell you from the side of someone who schooled hard and partied hard and I turned out fine. But I gave up the best years of my life in a whirlwind of projects, presentations and honors. I received commendations from the President of my school, and Honors at my Graduation, but that does little when you realise that the days you were supposed to remember best are gone forever now. I spend 99% of my time at work, or right here in the living room doing masters project work (like I'm doing now). I pretty much go outside just to get groceries, and cycle.
Take life a little slower. Take your courses, but if your finances let you hang aorund a while then just take a *normal* course load and enjoy what college has to offer more.
I never studied abroad, I never went on spring break, heck, I never had a summer off (did school through summer and worked). I never went to night clubs (frat houses though my last night, good times). I mean sure there are moments I remember fondly (and some not so good ones) but it could have been better.
Pace yourself. Don't be lazy. But burnout is real, and I saw it happen to a lot of the friends I admired most, especially the asian ones.