Last Minute Things to Watch Out For?

It's my first time attending Lundum Dare and I'm planning to make something for the Compo.

I want to be prepared for anything that could go wrong or be forgotten at the last minute when it comes the comp because I'll probably be too focused on meeting its 48 hour deadline.

There's no tricky hoops to jump through, long upload times, or hard to spot submit buttons when submitting a compo game right? ๐Ÿ˜…

Thanks for any advice/tips.