Hi, going on my 3rd year BSN program now.
What I learned though in nursing school is not only working hard, but working smart.
The lecture classes are always bulky in material and always you will have a bulky amount of information to learn. But don't fret, because all you need to do is focus on what the lecturer discussed since they are the most important info you must learn. Quizzes and exams are tricky because they don't focus on rote memorization; you need a lot of common sense (sometimes we forget that we have this, don't we lol) and some analyzing to do.
Clinical instructors will be harsh to you, but not all of them. I've met wonderful clinical instructors who teach, correct, and act nice to you, and I've also met CI's who are well...you know what I mean. If you've received a criticism, it's inevitable not to take it personally, but move on and don't do the same mistake again.
Hydrate and eat before you go on clinicals. Doing your 6 or 8-hour duty/clinicals in the Delivery Room without food or drink is pure torment (that applies to all clinical setting)
What else? Hmm. Don't worry you'll still have your free time! It depends on how you manage your time. I have my free time still, and there are days that I don't, but you'll have at least a day or two in a week for a break :)
Nursing school is tough, but think of it it will only last for 2-4 years.
Have fun and I hope we all become nurses in the future.