Get Those Brakes Checked!
Wait, all that squealing I heard while driving wasn't a new channel on Sirius Satellite Radio devoted to Axl Rose? Better get those brakes checked -- especially if you're about to endeavor upon a lengthy road trip involving hills. Or flat road. Or you get the point.
The Remedy: As the most important safety feature on a car, brakes can have a profound impact on that little thing called stopping, so have a mechanic check 'em out before you set off to conquer the interstates. Brakes need to be replaced when the brake pad is worn down past the minimum thickness specified by the car manufacturer or state regulations. Other signs they need to be replaced? If they're soft/mushy, hard or resistant, or if the warning light on your dashboard is alight. But that one just seems obvious.