Basically, it just gives your account the facility to go into minus numbers, if you want it to. Many banks charge relatively high interest rates for overdrafts, but rarely as high as a credit card - and they will give much better rates for good customers.

Real Loans.

When you're buying one big thing at a fixed price (like a car), or you're going to spend all the money on one type of thing (home improvements, for example), it's worth budgeting it all out and going to a bank or another loan company. They'll be able to lend you the money at a much better rate than a credit card would, simply because they know why you're taking the loan and can set regular monthly payments for you to repay it.

Credit Unions.

Credit unions are like banks, only more local. They are co-operative, owned by their members and run by the community, and are a great place to borrow money. This is because there are limits in law on how much interest credit unions can charge, and they don't need to make a profit for owners or shareholders, because they don't have any. It's well worth checking if there's one in your area.
About the Author

Gordon Goh is the owner of Easy Credit Card Guide.com offering free credit card information for everyone. You can receive a free credit card at http://www.easy-credt-card-guide.com and free Credit Debt Repair Guide at http://credit-debt-repair.cogia.net