Your credit score is now the most important factor in determining how much house you can buy, so if you are in the market for a new home, you need to understand how it affects you.

In order to make it easy for mortgage companies to determine the risk of lending to you, they are using a system called credit scoring (also called "FICO" scores).

When lenders look at your credit report, they can instantly see how much debt you have, how reliable you are with bill payments, and if you've had any bankruptcies within the last several years.

With your credit report, lenders get a "credit score" which takes all of this information and boils it down to a number between 300 and 900. The higher the number, the less of a credit risk you are seen to be, and this is how lenders decide which types of loans you will be eligible for.

As with all new things, there is controversy over credit scores.

To be eligible for some types of loans, you require a minimum credit score without any exceptions. And credit scores fluctuate over time. In fact, the mere act of applying for credit can lower your credit score.

How to make sure you have the highest credit score possible

To maximize your credit score, you should avoid applying for any new credit cards or consumer loans.

Don't go to the discount store and take them up on the "No interest, no payments for one year" offer -- and avoid financing a car!

After you buy your home and get your mortgage you can do all of these things, but before then it's a bad idea. Buying things on credit hurts your credit score, and leaves less money for your downpayment.

Lenders also look at this figure to decide how much money they will lend you, and how much interest they will charge you on the loan.

That's why it's best to wait until after you've bought your home to go shopping for furniture and appliances. There is also another reason to wait.

Once you've bought your home, you can get a loan for up to 100% of your home's value to buy anything you want.

If you learn to play by the rules of the lenders' game, you can get the best credit score possible, which improves the odds that you can get the home of your dreams.