[IgorPartola]

I carry three: two Amex cards and a debit card. The Amexes are for different cashback situations and one of them is a Costco membership card too so I have to carry both. I would actually like to add a backup Visa or MasterCard as well since lots of places do not accept Amex.

[thomaspaine]

I have the Costco Amex too, but how often are you going to Costco that you're carrying it around everyday?