Have a valid driver license and certified copy of your birth certificate or a valid passport for everyone crossing the border.
Park your car on the American side of the border at the Tijuana crossing. Look for the signs for the correct parking lots. Your car will be towed if parked in day parking and you decide to stay for a week.
Prepare to have your bags and person searched if the border patrol deems it necessary.
Have your declaration of all electronic and valuables items ready.
Wait at a Mexicoach sign at the border station parking lot for the bus to pick you and your group up. This is an easy and inexpensive way to travel to Rosarito Beach, Tijuana and Ensenada.