as defined by Fair Isaac, here are the major factors used to calculate your credit score:
35%,- punctuality of payment in the past (only includes payments later than 30 days past due)
30% – the amount of debt, expressed as the ratio of current revolving debt (credit card balances, etc.) to total available revolving credit (credit limits)
15% – length of credit history
10% – types of credit used (installment, revolving, consumer finance)
10% – recent search for credit and/or amount of credit obtained recently
Digg.com post, “You can hurt your own credit score pretty badly just by trying to improve things. This is a list of things you can do to battle the draconian practices of companies like Experian and beat them at the credit score game.”