Puddles dry up shortly after an NPC reacts to it. Either use more
than one bottle or get a group to enter the puddle together. Holy
Water may stop one undead from passing through, but the second
can get by after puddle dries up from first undead. Aim carefully;
hitting an undead with Holy Water directly will hurt it, but having
the puddle under it will finish it off.
Water Arrows hitting an outer edge of a Moss Arrow carpet will
spread the carpet much farther. Moss Arrow at someone's mouth
will keep them busy choking long enough to slip by without attracting
attention or wasting Flash Bombs.
Save before sneaking around Hammer or Pagan sites. If you can
move around without being seen or detected, you can steal items
without getting penalized. Otherwise if you are running haphazardly,
they will know that you took it and you will lose faction status.
Do not be seen around any corpses or puddles of blood. Even if
an NPC killed the body, you will still be blamed and hunted down
for it.
The docks great place to make bodies disappear in water, although
this will kill unconscious bodies.