The mandolin, by the way, is tuned exactly like a violin, except has two courses of strings - like a 12 string guitar. Very intuitive to play if you know guitar. What I do, is in my head, I reverse the fingering on all the chords, then the fill is easy. That is.... the strings are G, D, A and E, with E being the first string (highest). So real quick in ya head, as you play, just play it backwards, or upside down if you will, and you got all your chords right where they need to be. Zeeemple no? It works! REALLY!
--- For anyone interested, if you can find a Takoma M1 or M2 or M3 mando, grab it... they're build incredibly well. No longer made but really nicely made. The M1 has crappy tuners, but tuners can be changed. The actual construction of them all is a cut above.