For a gopro you can't be more than 10 feet away from the rider, that will solve about 50% of your problem right there. Another hint for o pros is only film when the lighting is good, and if the lighting is not good get even closer to the skier.
Also only include the best of a certain trick off of a certain feature, so if your hitting rails and you get a straight slide and an fs 270 only put the fs 270 in the edit. Hit different features, get different angles, and only include the best of each trick type.
If your bag isn't very deep then hit a lot of different features and get a lot of different angles and only include a falling shot if you get the trick later or its a brutal fall.
Keep up the hard work and you can really make some cool stuff man good luck!