From braking…

At that time, when I was still small, it was said in the driving school: 80% front brake and 20% rear brake. In case of emergency braking the front, if it is not enough – take the rear one with it, be careful in curves and always gently.. After that I set myself in spite of 17 years of break in between and still put considerably short braking distances despite old car. I also meet people with younger bikes, who for example already make it, on a he tour with a lot of mountain down and bends to bring the rear brake to the boil or which lie in curves long because it breaks out behind.. Funny… So please, tips for drivers of machines WITHOUT ABS. How is it best? What should be avoided? Why does it come so often to such escapades?