There is a nice mob in eversong woods (just south of silvermoon city) for when you need to lvl up a new weapon, like when you're lvl 20. Useful for BE paladins especially for when you get your new polearm. Basically, it's a lvl 6 Plaguebone Pillager that has an instant respawn. You just stand in one spot and repeatedly right click until your weapon is at the skill lvl you want. He wanders so you might have to kill a few to figure out which one it is, but his respawn point is 50,57 in the middle of the dead scar. When you're in the right spot you'll be standing just south of a little busted up cart. Useful more for lower lvls, not sure how weapon skill-ups work for higher lvls, I'm guessing you would need a higher lvl mob to do this on.
Here is a link to the video I made to help you find the right spot, sorry for the **** quality.
Again, sorry if this is on here already or if it is common knowledge. I know it's not a super awesome exploit since you could just as easily run around and kill the crapload of mobs nearby, but this at least saves you effort of moving.
