Get more than one credit card and pay it off each month in full.

Also, how is your car loan done? Is a car loan on your credit? Or do you have the amount of money you owe on a credit card?

In technicall terms you are not supposed to take a credit card to pay off a car payment, but it when the your credit jumps up nicely. My buddy who is a member here, is 20 years old and just payed his M3 off onto one of his credit cards and has better credit than both his parents.

I plan on doing the same soon.