You can use a debit or credit card associated with Visa, Discover, MasterCard, or American Express. Discover is currently only accepted for US-based projects.
If using a pre-paid credit card, please make sure that the card has a value of at least $1 more than your pledge amount.
Kickstarter does not currently accept Maestro or Visa Electron cards. An alternative could be to create a prepaid virtual card. It can be used anywhere and only takes 3 minutes: http://www.mywirecard.com/en/mastercard.html