A car's value drops about 20 percent in the first year of ownership, according to CARFAX. Here are a few things you can do to help maintain its resale value.

Mind the mileage

If a car has either higher or lower mileage, it can affect its value, according to Cars.com. (CARFAX says around 10,000 miles per year is typical.) If a car has high mileage, it may not have as much life left as a similar car with lower mileage. However, Cars.com notes that a car with very low mileage may have problems from not being driven regularly or indicate it wasn't driven much due to problems. You may want to limit the miles you add to your vehicle, so the resale value doesn't drop, but also make sure you use it regularly to help avoid mechanical issues.

Keep up with maintenance

Routine maintenance and making repairs, when necessary go a long way toward keeping a car in good shape. CARFAX states that routine oil changes and replacing worn out parts can help keep a car from depreciating in value. Similarly, Cars.com says it's also important to keep the car looking good — so make sure it's fixed properly after an accident and that you keep the interior clean and fresh.

Keep the warranty

Warranties often transfer over to the new buyer, says Auto Trader. If your vehicle still has a warranty, you may want to sell the car before the contract runs out. That's something buyers may find appealing, and you may be able to get a little more money for a car with a warranty. Check with the warranty provider to be sure it will transfer, but it could be a good selling point if it does.

If you're looking for a new car, you may want to consider its future resale value as you shop. Choosing a car that will appeal to buyers down the road and keeping it in good shape may help you get the most for it when you're ready to sell or trade it in.