[mstade]

I use a (n.b. singular, not multiple) credit card from AMEX for the benefits. (Particularly excellent travel insurance and car rental benefits.) I make sure to never spend more than I can pay off at the end of the month, so that I don't actually ever get into debt. My own money is resting nicely in a bank account until the credit card bill arrives.

I never spend my own money directly unless I have to (e.g. the merchant doesn't accept AMEX or only takes cash etc.) because should I end up with fraudulent transactions or lose my card or whatever it may be, I have actual cash to back it up.

If you're fiscally responsible and make sure to always pay off the bill at the end of the month (with all that money you didn't spend) then credit cards are pretty much nothing but benefit. There may be a yearly fee associated (my card has one) with it but I've found it to be worth it for the benefits alone, but I also rack up so many points that I can use those to pay for the fee.