You'll hear the same phrase repeated over and over again by fellow students: "first year doesn't count anyway". While this isn't necessarily wrong, don't let that fool you. First year knowledge acts as a foundation for the rest of your degree. Translation: You can't learn the hard stuff without a basic understanding of the easy stuff first. Unless you want to spend your second year slaving away in the library and trying to catch up, make sure you're working hard as well as playing hard.
I only just passed my first year, and while that didn't impact my final grade, it meant I wasn't allowed to spend a year studying abroad in New York. Learn from my mistakes and check if the year in industry or study abroad programmes require a specific first year grade before you decide to spend every waking moment at the student union club.