How do you quickly switch fingerings from Em to Bm? I've been practicing for months and there's still a brief delay whenever I do that particular transition, since my middle finger, ring finger, and pinky can't move into Bm fast enough. I know you're supposed to choose the fingering for each chord that most efficiently follows the previous chord, but so far I haven't found anything better for Bm than x13421. (I'm fretting Em as 023000. I've tried 034000, too, but that seems even more awkward.) Any advice?