If you live within a city-limits, be sure to check with the city manager’s office to see if they have any regulations about working on your own vehicle in your yard or driveway. Thanks!
Park your vehicle on a level surface and put blocks of wood or bricks behind the rear tires.
Jack the front of the vehicle up enough for you to get under it.
Be SURE to put jacks stands under the body (behind the front wheels) or put some timbers under the tires and let the weight off the jack.
Put a piece of cardboard, or an old blanket, underneath the vehicle to lie down on (I hate working on the *ground*).