Keep working on your rolls, and your breakfalling skill will
follow naturally. Allow yourself to be relaxed and not think about
whatever is going through your head at the time. It's
understandable that you think you will break your back, but that
won't happen. Let that thought go and just do it. Also, focus on
the basics that you're taught in your dojo such as learning how to
slap out and the proper body positioning. Also, try grabbing a
sempai in your class to help you out before or after class.
I also found watching ukemi videos helped, too. The ones by Donovan
Waite and Bruce Bookman are both very good. Bookman's videos
focuses more on the traditional breakfall and Waite's focuses on
"soft breakfalls." Depending on what is taught in your dojo one
might be better than the other. Ask someone in your dojo for advice
as which to choose. Go into the video reviews on this site and you
can find links to them. Also, a lot people her recommend the Ellis
Amdur video, too.
