My advice is:
- Don't be afraid to ask for help - If you're having trouble with something, it isn't a bad thing to admit that you need assistance
- Time management - If you're in many ECs and have tons of homework, it helps to have a schedule to adhere to so you can avoid procrastination. Google schedule is a good one to use.
- Limit procrastination - procrastination is fine, but its not something that you should do so often that it starts to mess up your grades
- Sleep - At least 6-8 hours a night
That’s all I can think of so far, but good luck starting your freshmen year!