Don't skip classes. Keep up to date with your assignments. That way you won't have to scramble at the end of the semester to get ready for exams.
Use your spring break to get caught up, if you need to. If not, enjoy yourself. You have earned it.
Watch for the partying aspect that follows spring break. Don't get too caught up in it. Keep studying. Set aside time in the library.
Don't forget: time to withdraw from courses without penalty.
Don't forget to keep a balanced perspective. Try to study, relax and socialize, in good proportions.
Don't forget: see your faculty advisor.
If you want to take a specific course simply because it interests you, do it. But don't put off taking required or difficult courses for too long.
Start thinking ahead to the summer, to your coursework in the fall and to selecting an academic major.
Don't forget: preregister for fall courses.
Now is the time to manage your time effectively. Too many competing interests can make studying more difficult than normal. Keep things in perspective.
If you need tutorial assistance, make sure you get it. Keep in touch with your advisor.
Be aware of the social/cultural opportunities on campus. Be actively involved in student groups/organizations.