Major League Hacking http://guide.mlh.io
Ultimate Guide to Hack Weekends https://github.com/kinlane/hack-weekends-guide
How to Run a Successful Hackathon https://hackathon.guide/
Hackathon Planning in Less than 10 Steps https://techcrunch.com/2012/03/31/hackathon-planning
Devpost resources for online hackathons http://post.devpost.com/app_contest_resources