I'm about to make my first jelly roll sheet -- basically, the Christmas Yule
Log.

I get the feeling that it can be pretty tricky to get it rolled up without
cracking and falling apart, so I wanted to prepare as well as I could by
asking for tips from experience.

I've read about various ways to help things along, like putting a damp cloth
over the sheet to keep it moist as soon as it comes out of the oven, etc.

Anybody have some experience here to contribute?

Thanks,

John