Check your belts and hoses
Yes, this is covered by your manual, but at intervals that can extend far beyond a year. Here's your best-case scenario if a belt or hose fails on your car: you, stuck on the side of the road, as traffic whizzes past you at 80mph. At worst, the failure will result in catastrophic damage to your engine, and you're either on the hook for thousands of dollars to replace the whole damn thing, or you're buying a new car.
Pop the hood, and look for any bulges on hoses or frayed edges on belts. If you can't see a belt -- and on many cars today they're hidden beneath covers and other components -- you can either remove the cover with just few screws, or, if you're not confident in doing so, there's no shame in having someone else check for you the next time you take your car in for an oil change (which they should anyway).