Soak it all up. I was fortunate enough to be an intern at BOSS Snowplow for two years in a row, and I wouldn't trade my experience for anything. One of the best things you can do while being an intern is say "yes". Say yes to a project that might push you out of your comfort zone a bit, say yes to joining a committee or volunteering for an event. Soak up every ounce of the experience that you can, even if it doesn't directly pertain to your internship position, it will be a learning opportunity and valuable experience in some way.