Nifty mnemonic device I learned at Honig's clinic regarding the DPI categories:
"C THE GAP"
C - Cutoff
T - Tangle of the feet (although this really isn't DPI if he's playing the ball)
H - Hook and turn
E - Early Contact
G - Grab and restrict (I think that's what G was for)
A - Arm bar
P - Playing through the back
