I made flashcards by cutting index cards in half, smaller is easier to carry around where ever I went.
One set had all the hand types with indices
One set (2 cards) had the optimum betting schedule based on pen
One set, which at the beginning I thought was the easiest to learn from, had a full line from the index chart on each card. For example:
9 vs 2 3 4 5 6 7
:::: 1 0 -2 -3 d 5
and just remember the string (like a phone number, before we had speed dial) 9 is 1,0,-2,-3,d,5
Some lines only have a couple of indices so I made individual flash cards for those.
I still use them when CVBJ is not available.
BJC