(You should get a Listen check. Someone suggested having a sleeping character "Take 0" -- ie, you just get your final skill level. If that's high enough, you hear whatever or whoever it is. I have children. Believe me, people have a chance of hearing you when they're asleep.

)
Get an iron golem and have him tag around with the party. Have him keep watch from *inside* the fire, so he'll give your foes nasty burns as he pounds them into pulp.
Seek out the inevitable group of bandits, kick their ass using subdual combat, then hire them to do the watch. That goblin rogue might be sneaky, but if you've got 60 people doing the watch, he's *going* to get caught.
Get simulacrums of all the most powerful foes you defeat. They're completely loyal, and 60% of the power of a red dragon or a lich is still a whole lot of power.
If you're a mage, get chain contingency, and have it set to react to anyone disturbing you in your sleep. The spells in your contingency should be ethereal jaunt and meteor swarm. That will take care of things quite nicely.
If you're low level: coffee. Lots of coffee. And get ready to find out about the Exhaustion rules. You might want to take that Endurance feat, after all.
