A decent afk trick : City of Heroes - Submissions

Join a group, turn hover on, click a teammate and hit f (follow hotkey), then hold control and click on one of your most used ranged powers. If you're a melee and only have something like a ranged debuff that's ok. Now just leave your character alone. As long as that person stays in the group and doesn't do anything funky you will follow them with hover and attack anything they attack automatically with whatever power you toggled with ctrl-click. If you're a melee any ranged power will do so long as it *looks* like you're participating. Its easy to get away with going afk for a long time like this so long as the group knows what they're doing and doesn't get killed (its easy for competant groups not to die)