You can move through incorporeal beings, but they get an AoO.
Sheathing can be made as part of a move action just as drawing, but it does provoke an AoO.
Opening or closing a simple door is treated as taking 5 feet of movement for each of these actions instead of a move action for ease and speed of play.
The feat in Core Rulebook, Leadership, is locked for play due to power.
Shooting into water, you take no penalty for the first 5 feet. Each Subsequent 5 feet adds a range increment penalty.