What are the best ways to manage a long-distance relationship?

My girlfriend [18F] and I [18M] have been together for about two years, and in six months I’ll be moving away to pursue my master’s degree for the next four years. I know it might seem silly since we’re just teenagers and a long-distance relationship can be tough, but we both really want this to succeed. Unlike many relationships in our generation, we strive to handle our issues maturely and communicate openly—it's us against the world. Still, I can’t help but feel worried and a bit anxious about what the future holds. Does anyone have any advice on how we can make this work? I’m determined not to let go of this incredible opportunity. TLDR: Looking for tips on transitioning from being in the same town to a long-distance relationship.