It's a pretty simple process. First, you apply for a credit card from a bank. It helps if you have a good credit score but even if you don't you can get a basic one. Then you start spending very small amounts on it. Doesn't matter the amount, a few dollars every month and make sure you pay that bill on time. In the meantime, get a college degree, followed by some well paying job. Keep paying that monthly credit card bill on time though, and all your other bills. And then, a few years down the line from your first credit card, you'll be able to get a few more with your good credit score. Hell, they'll even send you free ones in the mail. Suddenly, you'll have all the credit card numbers you'll ever need. Banks hate this one simple trick!