Your freshman year of college is often your first time living away from home. You learn a lot of things about yourself during that time.
1) True friends stay friends with you no matter the distance
...no matter the situation, no matter anything.
2) Just because you don't meet the right people right away doesn't mean they don't exist.
You just have to participate in the right thing or look out for people that you don't see very often.
3) Other peoples lives aren't as perfect as you imagine they are
Everyone has flaws and go through problems. That ideal life you're imagining they have is just that... imagined. They may be going through real pain and you never knew.
4) How to not take things lying down
Be assertive. Don't let people get away with mistreating you. If they did something to make you upset, let them know, because they may not know. If they don't know they might do it again.
5) It feels good to accomplish a goal
Working towards a goal helps with your self esteem a lot. it makes you feel capable and that's one of the best feelings ever.
6) Sometimes your major plans can change
Sometimes it might surprise you what your favorite class is. Being genuinely interested in a class is an amazing feeling in college. That one class that makes you excited to attend. Consider taking similar classes in that field. Who knows, it might lead to a possible major or minor.
7) People might surprise you
Talk to people with different opinions than you. You can make friends in the most unexpected places.
8) How to be yourself even when you're surrounded by people who don't get you
Understand that you're doing things because you like to do them and there are people out there who get it completely and enjoy those things too- you just may not see them every day.
9) Calculate how much credits you need so you won't be overwhelmed.
You may be taking six credits a semester when you may only need to take 5. Those extra hours could be spent going to tutoring, studying more, or going to the gym. This could avoid you being too overwhelmed now and too underwhelmed later.