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A lot of good advice already.
This sounds obvious but don't just concentrate on the landing, make sure you also concentrate on skiing out the 5/10/20/30 plus yards after the landing. Especially on bigger or sketchier drops so many people seem to just concentrate on the take off and the point of impact and forget everything immediately after that which ensure they eat shit pretty quickly on the immediate run out.
The impact is going to happen anyway, gravity will inevitably take care of that so put some thought into the split seconds after the impact - not just aborbing the impact with your knees but also keeping strong thighs and good form as well, ready to compensate for any slight imbalances or bumps in the snow etc. This means even if you don't nail the landing perfectly (which is bound to happen at times) you can still increase the percentage of cliffs you ride out cleanly from.