Bounty hunter or party room..
Bounty hunter>> double log (thats how i do it..) go to an unpopulated nonmembers bounty hunter world. go into bounty hunter with one account having an inv full of meat pizza, swordies, or lobsters and a valuable item. go in with the other account having on enough stuff to kill the other guy. meet up somewhere, kill the old account with the new main, and eat/pray/run for 180 seconds then exit.
Party room>> double log in to a very low populated world, maybe even a german world, and go to party room with noted rune platebodies on one account, cash on the other. put one rune plate in the chest at a time and pull the lever on the other account. pop as many balloons as you can until you get a plate and repeat..
hope i helped =P