Use a prepaid debit card
If you feel uneasy about carrying a lot of cash, try using a prepaid debit card, available from most banks. It works like a credit card, only you pay up front to have a specific balance loaded onto it. Every time you make a purchase, the amount is deducted from the total. Best of all, you get the protection of a credit card―you can dispute charges that appear on your statement―but you have a built-in spending limit.