Lag was being a real pain today and I had some ideas to minimize it's impact.
The game should attempt to extrapolate reasonable behavior when you lag:
1) If you're jumping it looks at your line of motion and continues your jump until you're over a safe spot. If there's no such spot it looks for the closest safe spot you can reach and moves you to it.
2) If you're moving through the area of effect of an intermittent trap it continues your motion until you're clear of the trap. If a straight line projection is impossible it does the minimum turn needed to get you clear.
3) If your last action was to attack a creature then you continue to attack that creature.