Things to avoid once you get to university:

Distractions-social media is there to keep you updated not entertained, avoid spending too much time on thé Internet unless you have free time(ex: after exams/ holidays)

Procrastination-start work early and dont push it to the end or else you will end up regretting it because you'll have a hard time finishing thé work and have hard time catching up on other subjects

 Taking on too many clubs/courses/jobs: don't overwhelm your self or you'll be too stresser and not have enough time finishing it

Negative attitude: preservere and don'r be too hard on your self, uni is all a bout learning how to study and new strategies to help you succeed. Putting yourself down or comparing your self to others wont help you , positive attitude will.

Shyness: Dont be afraid to ask for help when you need it, teachers, professoral and other friend will be glad to help you, even if they're not, remember you're thé one benefitting in the end. Préparation for thé workplace involves, good social skills.