From EQ2i, the EverQuest II wiki

Safe Fall

Is a skill that all scouts, bruisers and monks get which increase the safe distance you are able to fall from.

[edit] Notes

Falling Damage and Safefall Skill snippet taken from Everquest 2 game updates(Game Update November 14,2006)

• Falling damage is no longer taken as a percentage of your total health.
• Distance is now the only modifier in the amount of damage taken, falling velocity is no longer a variable.
• Damage is calculated as (Distance Fallen * 125).
• A safe distance fall is 13 meters or less (Just under the height of a griffon tower platform).
• A terminal fall is 80 meters. Any fall from that height (without safefall skill or some magic) will deal 30,000 points of damage.
• Safe Fall Skill increases the safe distance fall by 1 meter for every 5 points of skill. A skill of 250 would increase the distance a character could fall without taking damage from 13 meters to 63 meters ((250 / 5) + 13).
• Super jump abilities will now fall at the normal rate when jumping off very high places.

[edit] Tips

• Safe fall is perhaps the most time consuming skill to develop. Initially, the character with the safe fall skill can climb up the edges of a valley wall (like any other character) and then jump, and advance the skill. In short order, however, additional skill increases require jumping from higher and higher elevation. It appears that the fastest way to advance the skill is to jump from as high as the character can without actually taking damage (or at least taking minimal damage).
• As the safe fall skill is developed, it becomes increasingly difficult to find locations to jump from that are at the correct height, and if locations are found - usually it may take a while to climb back up to jump again. Initially, I did not keep track of good safe fall locations for training purposes, but I am now. Here are some skill advancement locations:
• Once I was able to travel to Sinking Sands, in the Croc Caves (-1200,-470) there is a rock formation a little further in (need coord) that can be climbed. Use this in order to climb as high as you can without taking damage upon a fall and then jump. Using this location will get your skill up to roughly 100.
• In The Lesser Faydark, near the Obelisk of Blight there is a cliff face (at roughly 718.00, -33.00, 485.0) this is an EXCELLENT place to work on increasing safe fall skill level, as it is easy to climb back up the side of the cliff, there is the full range of elevation so even lower skill sets can increase level here. I have increased my skill by over 30, by one skill point per jump up to roughly 138.
• In South Qeynos, in the Mages Concordium you can jump off the Blue Level to a ledge underneath the Runic drapes towards the bottom, then jump to the bottom and teleport right back up. This took me from 50 (500 damage) up to 110 (100 damage, you can then just jump to the bottom taking only 500 damage.