Warning: SMALL WALL OF TEXT!
Use different angles! - Nobody wants to see 4-6 guys having cool tricks, but from the same angles (like a tripod from top and bottom + "from the knucle"-shots).
Always have some movement in the shot! - (Everybody know how much better skiporn you get if you compare a still shot with a glidecam)
Use something to stabilize! - No matter how good the riding is, if your videographer has a strong case of parkinsons: the shot will prolly be shit.
Editing to music! - If you edit to the music. Such as cuts, landings, transitions, highlights people will also feel the music, and it won't make it look/sound so shitty.
Sound design! - Please, do use some sort of sounds in the edit. Unless you shoot with a GoPro, you're excused, but in most cases having a few sounds such as snow tearing, rails and stomp-sounds will help your edit....massively! (Especially if you use a tune that isn't so thick)
Filler material! - As bishop said, if the shots ain't bangin' leave them out, or use a small portion of it to fill inn some dead-time or speed up the edit. That can be such as bails, face-shots, environment-shot, screams/rages or tricks that look shit except for that one part of the rotation.
Be original! - Even if you shoot jumps, rails or jibbs, don't try to make the edit something which it's not. Find the mood, tempo and theme you want, and do your best within' that. Don't try to cover anything from a clean superbly shot artistic edit with the meanest B&W "hood-edit" (if that's even a therm).