Magelo is a nice tool for remembering where certain mobs spawn. They have a little map that show where certain NPCs have been spotted. They also show what loot has dropped off of them. With Mischief, it will be interesting to see how Magelo handles this. There are going to be lots of fun bits of misinformation for non Mischief servers when people try to use some of the Magelo tools, after items drop off of creatures they normally don't.