This is a common frustration for even the most experienced of skiers.
I have found that the most common problem is weight distribution. Most people tend to lean on their back foot a bit too much when they start hitting rails. This almost always leads to slippage and a crash.
So keep in mind, weight your feet evenly. Your downhill foot should have just as much weight on it as the trailing foot. This will make sliding sideways much more predictable.
Mr.Bishop. -We could at least try to be mean to ski racers or something. Just lashing out against our own family seems silly and divided.