How to win a hackathon (tips from a 7x winner & organizer!)

How I've won 7 hackathons! Timestamps: 00:00 - My hackathon background 00:40 - General hackathon vs sponsor prizes 1:16 - Judging process 1:50 - What impresses judges 2:35 - How to pick a strong idea 3:08 - Common demo mistake 4:51 - Split up work 5:16 - API contracts 5:38 - Use libraries 5:59 - Use visuals 6:34 - During the hackathon 7:13 - Start demo early