Do the work. College isn't hard but you can't just breeze through it like high school
When clubs and organizations open, attend every single one that interests you, even if you end up not joining any of them
get a part time job. seriously, just get one
be friendly with your professors and visit them during your office hours at least once every two or three weeks. This is gonna pay back big time once you need to start internships
FUCK SOCIAL MEDIA! FUCK ALL OF IT! DO NOT FALL FOR ITS TEMPTATION DONT SAY A GODDAMN THING ON IT BECAUSE IT CAN AND WILL BE TRACED BACK TO YOU. only have it so companies can reach out to you if they need to, and leave it at that.
Buying books is mostly a scam. You can pretty much find most of them online in a pdf file by many ways. Only buy a book if you have no other choice.