Meal prep is a great way to make sure you are eating well while saving as much time as possible during the week.
Talk to your instructors. Get to know them. Their advice can be invaluable in knowing what they expect in the classwork and homework, and after you graduate you will want to ask them for letters of recommendation for jobs. If you don't have a relationship with them they are less likely to give you one.
Likewise, talk with your classmates. Lifelong friends are made in college, sometimes in the most unlikely circumstances/classes. I was a history major and met one of my best friends in a seminar class about genocide, we went out for ice cream and watched cartoons after each class to cheer ourselves up. And now nine years later we still meet up once a week for ice cream.