from WSJ
credit utilization
30% of your FICO score is based on "credit utilization," a broad term that includes how much you've used of each credit limit, how much you've borrowed as a percentage of your total available credit and even how big the dollar balances actually are.
Cut back your credit-card use for two or three months before you plan to seek a car loan or mortgage so that your balances will be more modest.
on time
35% of the total, is whether you have paid your bills on time. One late payment will ding your score for up to a year, very late payments can hurt you for two or three years, and collections and bankruptcies can sting for up to seven years.
credit history
closed accounts in good standing will stay on your record for a decade, says Barry Paperno, FICO consumer-operations manager. Both old and closed accounts can help your score because the length of your credit history is another, if smaller, piece of the formula.
Preserving your credit history is one reason that Kenneth Lin, CEO of Creditkarma.com, recommends that you don't formally close an account but let the issuer close it for lack of activity. The longer the account stays open, he says, the more you'll add to your credit history and the longer you'll benefit from the additional available credit.
hard inquiry
ask up front if a bank, insurer or car dealer plans to check your credit record. Luckily, shopping around for a car or education loan or mortgage counts only as one inquiry as long as you do it within a few weeks. Otherwise, multiple inquiries may knock your score back for a year.
750
every 20 points in your score can mean a slightly lower mortgage rate or better car loan, but only up to the mid-700s.
