A skier or snowboarder must behave in such a way that he or she does not endanger or prejudice others.
A skier or snowboarder must move in control. He or she must adapt their speed and manner of skiing or snowboarding to their personal ability and to the prevailing terrain, snow and weather as well as to the density of traffic.
A skier or snowboarder coming from behind must choose their route in such a way that they do not endanger skiers or snowboarders ahead.
A skier or snowboarder may overtake another skier or snowboarder above or below and to the right or to the left provided that they leave enough space for the overtaken skier or snowboarder to make any voluntary or involuntary movement.
A skier or snowboarder entering a marked run, starting again after stopping or moving upwards on the slopes must look up and down the slope so that they do not endanger themselves or others.
Unless absolutely necessary, a skier or snowboarder must avoid stopping on the piste, in narrow places or where visibility is restricted. After a fall in such a place, a skier or snowboarder must move clear of the piste as soon as possible
A skier or snowboarder either climbing or descending on foot must keep to the side of the piste.
A skier or snowboarder must respect all signs and markings.
At accidents, every skier or snowboarder is duty bound to assist.
Every skier or snowboarder and witness, whether a responsible party or not, must exchange names and addresses following an accident.
The FIS, Fédération Internationale de Ski, has built this set of 10 rules as a Code of Conduct for the slopes of alpine skiing and snowboarding! Please read them and stick to them! Please specially read rules number 5 and 6, which seem to be ignored by lots of people nowadays!
There's one more hint, you could maybe try next time: personally I always try to look uphill before stopping or making a remarkable direction change. On top I give hand-signs like I do when on my bicycle. This makes it way easier for the riders behind me to predict what I will do next. Being predictable is key for safety on crowded slopes!