By dollar amount, most of my spending is by card, especially since I started charging my groceries, which is something I NEVER thought I would do. The old warning about not charging something that would be gone by the time the bill came.
If I am lazy I will buy gas on credit, but the 10 cent a gallon discount for cash is pretty attractive.
Big chain stores, usually card. Mom and pop places usually cash since they small businesses seem to really get hit hard by the credit card fees. Although more and more small businesses are adding a charge for using a card.
I never leave home without $60 cash in my wallet, enough to buy a tank of gas in an emergency like the POS network failures that happen from time to time.