Your credit score is like your personal Yelp rating. Lenders use it to decide whether they'll let you borrow money to buy a car or a house, take out a school loan, or rent an apartment. Plus, it affects the interest rate on your credit cards. Scores can range from 300 (disaster) to 850 (perfect), but I want you to aim for 760 (excellent). Avoid these pitfalls to get there stat.