The best way to fix your credit score? Ignore it.

Getty Images; Alyssa Powell/BI

Worried about your credit score? Maybe you weren't before, but now that I mention it you may be wondering when the last time you checked it was. Even if you're pretty sure it's fine, the topic is often enough to cause a moment of panic, a sinking feeling followed by an "Oh God, what if something's happened?"

That little three-digit number is a big deal in our financial lives. It serves as a sort of grade for how you handle money. An A gets you approval...