Be prepared. In my case the material was sent out a week beforehand. Use the time to setup your machine(s) and code base so you can start directly. Do research on the topic. I’ve not looked into state of the art algorithms for the problem beforehand. This cost me a lot of time in the Hackathon, to understand the algorithm we used. Have compute resources ready. I could have used 2 further machines, but forgot to setup ssh, Teamviewer or any other remote control on them.