Well, depending on your mileage have it properly serviced, depending on how old and mileage replace all your fluids, plugs, check your tires. If you need extra room look at getting a cargo basket or box. Keep paper maps on you as well as a GPS. If you plan on wheeling, a bit make sure you recovery points on your Lib a tow rope, air gauge and compressor, some wood, water, toilet paper and/or baby wipes, fire extinguisher.
When you get knee-deep in a situation, floor it.