Some time ago I taught myself that I didn't need to barre my major chords to play them up and down the neck, if I just played the three strings I fingered them on, so xx321x (F) can slide up the neck for F#, G, Ab, and so on, and xx333x (A) can likewise slide, and between these two formations I could cover all the major chords. Later I found that I could do three-string minor chords using the formation of xxx321 (Bbm), and those were moveable, too. But the E-minor shape chords threw me, because I'd been used to fingering them in barred shapes up the neck; i.e. F#m = 244222. Out camping last week, it finally dawned on me. xxx222 is also an F#m. Och, tamale! Now I have a full rack of minor chords, up and down the neck. I know that most of you guys already knew about this--why didn't you tell me?--but this is a real breakthrough for me.