I generally use cash. Something I learned young was that seeing the money in my hand and watching it go to another's really set in stone how much I was spending.
Lots of transactions are done through my bank, though. My rent is an autopay set up. I pay my utilites through the net. I don't have a credit card, but use a debit card instead. I don't ever want another credit card ever again. It took my ex and I a long while to get out from our shared cards before we diovorced.
I was just curious because I was reminiscing and about 20 years ago, my friend was talking about never carrying cash on him. His wallet had quite a few credit cards in it. He used them correctly, though, never overspending and paid off all balances each and every month. I hope that helps explain my strange poll