Ok, this is somewhat of an exploit, as it's using a quest against the intention, but not really. But since "Tips and Tricks" is also in title, couldn't find a better place to put it. Feel free to move it =p
Ok, so there's a quest called "Goodnight, Gronn" in Blade's Edge Mountains obtained a lvl 66. The premise of this quest is to use some sleeping powder to put a lvl 70 elite named Grulloc (located a 60,47) to sleep, and then steal his sack. One nice drawback to this powder is that any damage will awaken Grulloc.
I think it works best with a rogue, but anyone who can defer aggro should be able to do it. What I do is lay in wait by Grulloc, wait for some un-suspecting soul to walk up, use the powder, then walk to get the sack. Pop out of stealth by using a thrown object, then vanish, and giggle as the poor guy trying to get the sack gets an ass whooping instead =D
You may think it'd be a longshot that someone else will be doing the quest at the same time as you're laying in wait, but i've been fairly sucessful at finding the right time to do it.
All flames piped to /dev/null, so don't bother.. hehe.