Well, I have a debit card - which I use for pretty much everything that isn't a business expense. I also have a personal credit card which I use very occasionally in situations where a debit card won't work (e.g. getting Euros from a ATM in Schipol airport) and an "emergency" personal card that I use in situations where neither my debit or main personal credit cards work (about once a year so far).

I also have a company credit card.