Credit card is a must when purchasing goods through online shopping. Alternatively you can use other payment method such as check. But check requires a few days for snail mail and bank clearance. Thus it is not as smooth as credit cards which are almost instantaneous.

Because of online shopping, credit card applications have been increasing every year. Some financial institutions are offering 0% purchase credit cards as an introductory benefit. And some are offering balance transfers from your existing credit card balance with zero percent interest.

My opinion is the best number of credit cards to hold is two cards. Having two cards will provide you with a backup card just incase any one of the card is encountering problem. And when spending using credit cards, always remember to spend what you can afford to pay later.