Tuck & roll

[ShadowsEdge]

Right before landing, if you hold down crouch, you should bend the knees, tuck & roll to negate damage. Maybe like +3 height damage? Just an idea. 
 

[Never Jhonsen]

There was a bukkit plugin for that other block game that I used to use a lot, whenever you landed whilst holding SHIFT your damage was reduced by 50%

[LadyWYT]

Hmmmm...this would make climbing down cliffs a lot smoother.