A healthy credit score is a key part of financial success, but what are the fastest ways to boost your score? First, pay your bills on time because 35% of your score accounts for how timely your bills are paid. Try setting reminders on your smartphone or link your credit card account to your bank account so your bill is automatically paid each month. Don't risk the strength of your score over a silly late payment. Next, pay down debt, since 30% of your score accounts for your utilization ratio. That's how much you owe versus the available credit you have. Paying down debt lowers your utilization ratio, which raises your score. Finally, avoid closing down credit cards, especially ones you've had open for years. This erases vital credit history from your credit report and could ding your score.