Hydraulic leveling jacks are undoubtedly the best way (since you asked!) as they level and stabilize 100% at the push of a button. But they are VERY expensive and add a lot of weight and complexity to your coach. Frame mounted crack down jacks (get good ones) are much cheaper and won't work quite as well but many folks use them. Or, since a motor home is already a pretty stable platform you can just get used to a bit of rocking and not bother at all.