Tips, I can give you tips. Start low and go slow.
My credentials: Eight years in martial arts two styles, 4 years in each. 4 years in my 20’s and 4 years in my 40s, both styles had throws and falls.
Falling:
Find videos and find more than one until you find the one that stresses good technique and has a gradual progression and/or you really get an understanding of how to do the fall.
Like in this one:
http://www.youtube.com/watch?v=RgPd29MlHpg
This is an excellent tutorial, and all you need to learn a good shoulder roll that won’t skin your knee every time, like in the video below. And it shows that Martial Artists don’t have a lock on doing good falls. If you know someone good in Parkour rock on.
To work, any fall has to be 2nd nature but once they are they will save your behind when you can’t run it out. (as an old man with bad knees I don’t run many of them out)
The best thing about learning to fall is you learn not to stick your arm(s) out, called ‘posting’ and break your arm/wrist(s) and you learn when to tense and when to relax which minimizes injuries and hurts less.
Side and back falls are not hard to learn if you start low. The shoulder roll is harder to learn but if you watched the video you saw there is no magic it’s just leaning the technique.
Shoulder roll, side fall and back fall are all a Uni rider really needs. If you learn one, definitely the shoulder roll. I would also say that really only Muni riders need a side fall and back fall because of the odd angles and uneven terrain. Even then they will be of limited value but better than nothing.
Like most things, its not strength or some superhuman ability it’s technique. Learn the technique and the rest is just practice. Learning to fall is easier to learn than riding a Uni that’s for sure.
If you want to learn from a martial arts school find a Judo or Akido school, last choice would be Jui Jitsu because in Jui Jitsu the basics start with more with joint locks than throw and falls. Many colleges have Judo clubs and typically will be more ‘relaxed’ than a school.
(videos for people who are interested)
Here are examples of the many angles falls can be done from the but they are sloppy and some out and out wrong. While they work on a ‘mat’ on a hard surface they would suck major. Some of these fall would produce broken ankles and all the shoulder rolls would produce a skinned knee every time. Unfortunately there are lot of martial arts schools teaching questionable (as polite as I can be abut it) technique.
Just skip around there is a lot of repetition and its pretty long.
http://www.youtube.com/watch?v=Yo0_2OxSmAk
Here is a better example of basic falls with good technique:
(and much shorter)
http://www.youtube.com/watch?v=JgoLO1riEe0
and falls from throws:
http://www.youtube.com/watch?v=pFM-xRKbSec
to show how well they can work.