Yesterday I created a track dedicated to R0T IN as a way to cheer him up for when he returned from the hospital. It is a hospital track in which the forum goers are planning his escape and are successful! (Epic ending inspired from his Down with the Sickness thread.) So anywho.....I was pretty much done with the driving line (just needed to add to the operating rooms/decoration) and was saving, as I hit save the game console froze. I was pissed and thought I'd have to only recreate a little bit at the end. I was wrong. I couldn't access the file AT ALL! So morale of the story is
make a backup of the track you are working on in case you lose 20+hours of work or something

was about ~6+ hours into the track) I also save after each obstacle to prevent this from happening, but this is the first time it happened WHILE I was saving.
I decided against taking a break. I was just upset having put a lot of time into my tracks all the time and then having to start from scratch is very discouraging.
TL;DR =
MAKE A BACKUP OF YOUR TRACK!!