Here are a couple of ideas as to how to identify each individual sheet of film that you shoot.
I am using a binary system that will number up to 256 sheets of film starting at 0
In the field I just note down the number on each side of every holder in a binary system rather than the numbering systems shown I figure that I will not need more then 128 double sided film holders i.e.
00000010=2, 00000011=3, 00000100=4, 00000101=5, 00000110 = 6, 1111101=125 etc.
just use the method of marking the film holders as described on these pages
Hope this provides some inspiration