I read this on Ion Saliu's site and just had to put it in my blog..
As promised, here is the strategy applied to the pick-3 and pick-4 games. The normula says that 50% of the 3 digits (1 or 2 digits) of the pick3 game will come out within 1 drawing, that is, they are repeats from the preceding drawing. Or, 75% of the 3 digits (2 or 3 digits) of the pick-3 game are repeats from the last 3 drawings.-Ion Saliu
If you don't believe it, track your state's Pick 3 draw. I had to find out why the "stack" works and this is it. The only time that this may not work is when the numbers are going through a transition (different numbers start falling until they also start following this pattern).