Keep these moving tips in mind when you’re preparing to move across the country: Declutter and downsize as you pack. Number the boxes and label what’s in them. Don’t ship your pets. Service your car a week in advance. Perform a thorough walk-through of your old home before you leave. Keep your gas tank above 1/3 full. Reserve lodging at least a few hours before you stop. Don’t leave your valuables in your car overnight.