Multiboxing Tips: What was the one thing that really helped you move from a good multiboxer to a great one?

[Shodokan]

What made me a better boxer?
Simply grinding out ISBoxer and learning the ins and outs and how to apply it to mimic how i'd normally PVP as best as i could on a single character so that it felt seemless to go between multiple characters to singles. Other than that it was just getting use to my new keybinds and understanding just how to use all of my abilities on a round robin setup and tracking their cooldowns effectively. By doing this I became the top rated PVP boxer in the world in cata... last season getting glad on all 4 dks (though i did sell these before i quit, looked down upon here so i obviously didn't make an "OMG LOOK AT ME!" post and yes that was dual-boxing two of each in 3's)

Also people's dislike for me fueled me to be better than them :P

But I've since quit a second time I obviously have kept my accounts , but I likely won't be returning. Few months into quitting and no desire to play.