Pop the hood and have a look underneath. Check every fluid -- oil, power steering, brake, transmission and windshield washer fluid, too. You'll want to wipe away each splattered bug your car encounters. While you're under the hood, examine the hoses and belts for any cracks and splits. And don't forget the battery -- it's marked with the month and year it was installed in the vehicle. If that date was more than three years ago, go ahead and spring for a new one: Its days are numbered. If you're due for an oil change, have it done before you leave, and get a new air filter while you're at it.