my biggest piece of advice is to not waste time.
Dont wake up and sit in bed for a hour
Dont study with friends if you know you will get nothing done(most important, I never study with friends because its always going to be just less productive, get good study habiits ,go to libraries, go to office hours and talk to your professors like they are humans not like they are some higher power you are afraid of(but obviously show respect)).
and for initial college: dont be afraid about things not working out instantly. things take time. i hated my first semester at school and now im a senior really excited about this coming year.