Meet people. There is a wealth of talented and interesting people at a good hackathon. If you're joining a team, be very clear about your abilities and limits

Meet people. There is a wealth of talented and interesting people at a good hackathon. If you're joining a team, be very clear about your abilities and limits so they can resource properly. Find people who need a break and chat to them about what they're working on, what they do normally. Again, meet people. Talk to the sponsors, even if you don't need help. Those guys/gals are usually rad. Presentation matters. Practice yours.